43. (2x + 11)2 + 9 = 0
45. Number problems. The square of a number decreased by 2 is equal to the negative
of the number. Find the numbers.
2007-04-29 06:25:44 · 5 answers · asked by Dave 4 in Science & Mathematics ➔ Mathematics
43.
Is that a times 2 or a raised to the second power?
Times 2
4x + 22 + 9 = 0
4x = 31
x = 31/4 = 7-3/4
Squared
(4x^2 + 44x + 121) + 9 = 0
4x^2 + 44x + 130 = 0
2x^2 + 22x + 65 = 0
Using the quadratic equation, I get x = 2.42 or -13.42
45.
x^2 - 2 = -x
x^2 + x - 2 = 0
(x + 2)(x - 1) = 0
x = -2 or 1
(-2)^2 - 2 = 4 - 2 = 2
1^2 - 2 = -1
2007-04-29 06:35:44 · answer #1 · answered by TychaBrahe 7 · 0⤊ 0⤋
43. ans is 7.25
45. the number is 1
2007-04-29 06:36:40 · answer #2 · answered by Anonymous · 0⤊ 0⤋
43.
(2X+11)2+9=0
(2X+11)2=-9
4x+22=-9
4X=31
X=7 3/4
45.
xsquared-2=-x
hope this helps
2007-04-29 06:35:24 · answer #3 · answered by Maarten L 2 · 0⤊ 0⤋
43. x = - 31/4
45. x ^2 + x = 4 ...........do the qudratic formula
2007-04-29 06:30:31 · answer #4 · answered by superstar 2 · 0⤊ 0⤋
43) answer is -31/4
and
45) answers x= 1
2007-04-29 06:30:19 · answer #5 · answered by tennisbabe63 1 · 0⤊ 1⤋