Question

Help please thank you so much

Answer 1

1 is (p-7)(p+7) or B
2 shown
x^2 + 5x = 6
x^2 + 5x + 25/4 = 6 + 25/4 (take the 5 divide by 2 then square)
(x + 5/2)^2 = 49/4
x + 5/2 = 7/2 and x + 5/2 = -7/2
x = 2/2 = 1 and x = -12/2 = -6
x = 1 and -6 so B