Question

Tell me the answers of these questions

Answer 1

Answer:

b=

x^2-11x+28

x^2-7x-4x+28

x(x-7)-4(x-7)

(x-4)(x-7)

Answer 2

Answer:

$1. {x}^{2} - 11x + 28 = \\ = {x}^{2} - 7x - 4x + 28 \\ = x(x - 7) - 4(x - 7) \\ =(x - 7)(x - 4) \\ \\ x - 7 = 0 = 7 \\ \\ x - 4 = 0 = 4 \\ so \\ x = 4 \\ x = 7 \: \: \: \: \\ \: \\ \: \\ \:$

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