Question

(i)a = -7 , b = 9, c = - 11
(b) a x (b+c) = a x b+ a x c​

Answer 1

a×b+a×c

=(-7×9)+(-7×-11)

=-63+77

=14

14 is the required answer.

Answer 2

$a = - 7 \: b = 9 \: c = - 11 \\ (a)(b + c) = - 7 \times (9 - 11) \\ - 7 \times - 2 = 14 \\ ab + ac = ( - 7 \times 9) + ( - 7 \times - 11) \\ - 63 + 77 = 14 \\ hence \: the \: proof$