Question

4 (x + y) a minus b (+ b) x + Y () 2B - 3
$4(x + y)(3a - b) +b (x + y)(2b - 3a)$
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Answer 1

$4(x + y) (3a - b) + b(x + y)(2b - 3a) \\ = 4x(3a - 4b) + 4y(3a - 4b) + bx(2b - 3a) + by(2b - 3a) \\ = 12ax - 16bx + 12ay - 16by + 2 {b}^{2} x - 3abx + 2 {b}^{2} y - 3aby \\ = x(12a - 16b + 2 {b}^{2} - 3ab) + y(12a - 16b + 2 {b}^{2} - 3ab) \\ = (x + y)(12a - 16b + 2 {b}^{2} - 3ab)$

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