solve 4 x
2006-10-26 12:23:42 · 4 answers · asked by pfcmitchell1987 2 in Science & Mathematics ➔ Mathematics
Since this doesn't factor, you must use the Quadratic Formula
so -10 +- the square root of (100 - 4*4 )divided by 2 which makes it -10 +- 2sqrt 21 divided by 2. Simplify one more time by 2 and the final answer is -5 +- sqrt 21
2006-10-26 12:29:08 · answer #1 · answered by MollyMAM 6 · 0⤊ 0⤋
x^2 + 10x + 4 = 0
Quadratic formula:
x = (-10 +/- sqrt(100-16))/2
= -5 +/- sqrt(21)
2006-10-26 19:27:47 · answer #2 · answered by James L 5 · 0⤊ 0⤋
x^2+10x+4+0
x^2+2.x.5+5^2+4=5^2
(x+5)^2=25-4
x+5=square root(21)
x=square root(21)-5
2006-10-26 19:40:15 · answer #3 · answered by 6 · 0⤊ 1⤋
You have the fun of doing the quadratic formula.
(-b +- sq rt(b^2 - 4ac))/(2a)
a = 1
b = 10
c = 4
Have fun. :)
2006-10-26 19:28:40 · answer #4 · answered by SmileyGirl 4 · 0⤊ 0⤋