If you mean: x2+8x-9 = 0 then the solutions are x = 1 and x = -9
2 this Domo
x2-10 = 0 x2 = 10 x = the square root of 10
x2 - 8x + 15
x2-8x=0 ( add 8x to both sides) x2 =8x (divide by x) x=8 ( x2divided by x equals x)
If you mean: x2+8x-9 = 0 then the solutions are x = 1 and x = -9
2 this Domo
x2 + 8x - 20 = (x - 2)(x + 10).
x2-10 = 0 x2 = 10 x = the square root of 10
x2 - 8x + 15
12
x = 5 or x = 6
X2 + 8x + 16 = 10x +16x2 + 8x + 16=2x + 8x + 16=10x + 16
x2-8x=0 ( add 8x to both sides) x2 =8x (divide by x) x=8 ( x2divided by x equals x)
x2 + 6x = 16=> x2 + 6x - 16 = 0=> x2 + 8x -2x - 16 = 0=> (x+8)(x-2) = 0=> x = -8 or x = 2So, the solutions of the quadratic equation x2 + 6x = 16 are -8 and 2.
If that's + 8x, the answer is 4(x2 + 2x - 6) If that's - 8x, the answer is 4(x2 - 2x - 6)
x2 - 8x = 1 ∴ x2 - 8x + 16 = 17 ∴ (x - 4)2 = 17 ∴ x - 4 = ±√17 ∴ x = 4 ± √17