1.Solve for x: √(3x - 5) = 4 ?
2.Solve for x: √(3x+1)-√(x-1) =2 ?
3.-3 - √(3x+1) = 0 has no roots. (true or false)?
4.3 + √(3x+1) = x has two roots.(true or false)?
5.Solve for x: √(x + 12) = x ?
6.Solve for x: √(x - 5) = -1 ?
7.Solve for x: √(x2+ 64) =16 -x ?
8.Solve for y: √(2y+ 7) - √(y + 4)= 2 ?
9.The solution of √(x + 11) = x- 1 is -5.( True or False) ?
10.The solution of √(x + 11) = 3 is -2. (True or False )?
11.Solve for x: √(x2+8x) =4√3 ?
12.Solve for x: √(5x + 1) = √(4x + 1) ?
13.Solve for x: - √(x) = -1 ?
14.Solve for x: x + 1 = √(x + 7) ?
15. √(x + 1) +3 = 2 has no real roots.(True or False )?
16.Solve for x: √(x2-x + 5) =5 ?
17.Solve for x: √(2x2+ 7x ) -2 =x ?
18.Solve for x: x - √(2x + 1) =7 ?
19.Solve for y: 4 + √(5y + 1)= 0?
20.√(x 2+ 3x + 2) = -4 has no real roots. ?
21.Solve for x: 2√(x - 3)+ 6 =x ?
22.Solve for x: √(x + 10) =7 -√(x - 11)?
23.Solve for x: √(x2+ 4x - 1) =√(x - 3) ?
24.Solve for x: √(x+16)-√(x) -2 = 0 ?
2007-12-19 05:47:19 · 3 answers · asked by Daniel P 2 in Science & Mathematics ➔ Mathematics
Hi,
I agree with Tony's advice. Education first - then soccer.
1.Solve for x: √(3x - 5) = 4 ? x = 7
2.Solve for x: √(3x+1)-√(x-1) =2 ? x = 5
3.-3 - √(3x+1) = 0 has no roots. (true or false)? True
4.3 + √(3x+1) = x has two roots.(true or false)? False, only x = 8. The other answer, 1, is extraneous.
x² - 6x + 9 = 3x + 1
x² - 9x + 8 = 0
(x - 8)(x - 1) = 0
x = 8, yes x = 1, discard
5.Solve for x: √(x + 12) = x ? 4
x + 12 = x²
x² - x - 12 = 0
(x - 4)(x + 3) = 0
x = 4 or x = -3 <== discard -3 so x = 4 is answer
6.Solve for x: √(x - 5) = -1 ? No solution - square roots are positive.
7.Solve for x: √(x2+ 64) =16 -x ?
x² + 64 = 256 - 32x + x²
32x = 192
x = 6
8.Solve for y: √(2y+ 7) - √(y + 4)= 2 ?
y = 21
9.The solution of √(x + 11) = x- 1 is -5.( True or False) ?
False
10.The solution of √(x + 11) = 3 is -2. (True or False )?
True
11.Solve for x: √(x2+8x) =4√3 ?
x² + 8x =48
x² + 8x - 48 = 0
(x + 12)(x - 4) = 0
x = -12 or 4 Discard -12, only x = 4 checks.
12.Solve for x: √(5x + 1) = √(4x + 1) ?
x = 0
13.Solve for x: - √(x) = -1 ?
x = 1
14.Solve for x: x + 1 = √(x + 7) ?
x² + 2x + 1 = x + 7
x² + x - 6 = 0
(x + 3)(x - 2) = 0
x = -3 or x = 2 Discard -3 - it doesn't check. x = 2 is answer
15. √(x + 1) +3 = 2 has no real roots.(True or False )?
True
16.Solve for x: √(x2-x + 5) =5 ?
x² - x + 5 = 25
x² - x - 20 = 0
(x - 5)(x + 4) = 0
x = 5 or x = -4 This time both answers check so both are good
17.Solve for x: √(2x2+ 7x ) -2 =x ?
2x² + 7x = x² + 4x + 4
x² + 3x - 4 = 0
(x + 4)(x - 1) = 0
x = -4 or x = 1 -4 doesn't check, so discard it. Answer: x = 1
18.Solve for x: x - √(2x + 1) =7 ?
x² - 14 x + 49 = 2x + 1
x² - 16x + 48 = 0
(x - 12)(x - 4) = 0
x = 12 or x = 4 4 doesn't check, so discard it. Answer: x = 12
19.Solve for y: 4 + √(5y + 1)= 0?
No solution
20.√(x 2+ 3x + 2) = -4 has no real roots. ?
True
21.Solve for x: 2√(x - 3)+ 6 =x ?
4x - 12 = x² - 12x + 36
x² - 16x + 48 = 0
(x - 12)(x - 4) = 0
x = 12 or x = 4
4 doesn't check, so discard it. Answer: x = 12
22.Solve for x: √(x + 10) =7 -√(x - 11)?
x + 10 = 49 -14√(x - 11) + x - 11
2 = √(x - 11)
4 = x - 11
15 = x This checks.
23.Solve for x: √(x2+ 4x - 1) =√(x - 3) ?
x² + 4x - 1 = x - 3
x² + 3x + 2 - 0
(x + 2)(x + 1) = 0
x = -2 or x = -1 Neither checks using real numbers, so no solution. Using complex numbers, -1 checks.
24.Solve for x: √(x+16)-√(x) -2 = 0 ?
x + 16 = x + 4√x + 4
3 = √x
9 = x This checks!!
I hope this helps!! :-)
2007-12-23 05:51:15 · answer #1 · answered by Pi R Squared 7 · 2⤊ 0⤋
Write him a letter or email and say "it wnt wrk out bc you jus had a baby and i dnt wnt da baby mama drama". That should do the trick.
2016-04-10 07:52:20 · answer #2 · answered by ? 4 · 0⤊ 0⤋
It would be better to skip soccer than to skip doing your homework.
2007-12-19 09:06:32 · answer #3 · answered by Tony 7 · 0⤊ 1⤋