Question
Determine which equation has the same solutions as the equation below. 4x^2+32x-28=0 A. (x+8)^2=57 B. 4(x+4)^2=36 C. 4(x+8)^2=28 D. (x+4)^2=23 D C ) A B
Solution
4.2
(208 Votos)
André
Profissional · Tutor por 6 anos
Resposta
To determine which equation has the same solutions as the given equation
, we need to find the equation that can be transformed into the standard form of a quadratic equation, which is
. Let's analyze each option:A.
Expanding this equation, we get
, which simplifies to
. This equation does not match the given equation.B.
4(x^2 + 8x + 16) = 36
4x^2 + 32x + 64 = 36
4x^2 + 32x + 28 = 0
4(x+8)^{2}=28
4(x^2 + 16x + 64) = 28
4x^2 + 64x + 256 = 28
4x^2 + 64x + 228 = 0
(x+4)^{2}=23
x^2 + 8x + 16 = 23
x^2 + 8x - 7 = 0
4(x+4)^{2}=36$.