x2+8x = -3x2+5
4x2+8x-5 = 0
(2x+5)(2x-1) = 0
x = -5/2 or x = 1/2
In general, no.
2x^2 + 8x + 3 = 0
3(x2-x-7)
no
Assuming the 2 is meant to be a square this is the form: x2 - 3x2 = -2x2 + 8x + 5
x=-0.7
x2+8x+9 = -7 x2+8x+9+7 = 0 x2+8x+16 = 0 (x+4)(x+4) = 0 Therefore: x = -4 and also x = -4 (they both have equal roots)
x2 + x2 + x2 = (1 + 1 + 1)x2 = 3x2
x2 + 8x - 6 = 0 x2 + 8x + 16 = 22 (x + 4)2 = 22 x + 4 = ± √22 x = -4 ± √22
x2-5-4x2+3x = 0 -3x2+3x-5 = 0 or as 3x2-3x+5 = 0
2 this Domo
X2 + 8x + 16 = 10x +16x2 + 8x + 16=2x + 8x + 16=10x + 16