Question

3(2a-b)(2a-b)-19(2a-b)+28​

Answer 1

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Answer 2

3(2a-b)(2a-b)-19(2a-b)+28

$= > 3 {(a - b)}^{2} - 19(2a - b) + 28$

[Let 2a - b = x]

$= > 3 {(x)}^{2} - 19x + 28$

$= > 3 {x}^{2} - 19x + 28$

$= > 3 {x}^{2} - 12x - 7x + 28$

$= > 3x(x - 4) - 7(x - 4)$

$= > (3x - 7)(x - 4)$

$= > [3(2a - b) - 7](2a - b - 4)$

$= > (6a - 3b - 7)(2a - b - 4)$

Answer:-

$= > (6a - 3b - 7)(2a - b - 4)$