Question

Which of these is the result of completing the square for the expression x2 + 8x - 30 A. (x + 4)2 – 30 B. (x + 4)2 - 46 C. (x + 8)2 – 30 D. (x + 8)2 – 94

Answer 1

$x^2+8x-30=x^2+8x+16-30-16=(x+4)^2-46$

so the answer is B