Question

X square - 4 x minus 77 by middle term splitting

Answer 1

Answer:

$x^{2} -4X-77\\=x^{2} -11X+7X-77\\=x(X-11)+7(x-11)\\=(x+7)(x+11)\\x=-7 and x=-11$

Explanation:

Answer 2

Answer:

x2 -4x-77

=x2-11x +7x-77

==x(x-11)+7(x-11)

===(x+7)(x-11)

Explanation: