Question

factorise : 7(3a - b)² - 28(2a - b)²


pls answer urgent​

Answer 1

Answer:

7{(3a)^+(b^)-2×3a×b} - 28{(2a^)+(b^)-2×2a×b}

youcan solve this

Answer 2

$\boxed {Answer}$

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$\sf {\underline {\mathtt {\green {➻Given:- }}}}$

$\text {➺7} {(3a-b)}^2 {-28} {(2a-b)}^2$

$\text {➺(21a-7b)}^2 {-(56a-28b)}^2$

$\sf {\underline {\mathtt {\red {➻Using\: formula:- }}}}$

$\boxed {{➺a}^2 -{b}^2 {=(a+b) (a-b)}}$

$\sf {\underline {\mathtt {\orange {➻Where\: , }}}}$

$\text {➺a=(21a-7b)}$

$\text {➺b=(56a-28b)}$

$\sf {\underline {\mathtt {\pink {➻Applying\: formula:- }}}}$

$\text {➺(21a-7b+56a-28b) (21a-7b-(56a-28b))}$

$\text {➺(77a-35b) (21a-7b-56a+28b)}$

$\text {➺(77a-35b) (-35a+21b)}$

$\sf {\boxed {\underline {\mathtt {\purple {➻Hence\: Simplified }}}}}$

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$\sf {\mathtt {\blue {!!The\: problem\: can\: be\: more\: simplified}}}$

$\sf {\mathtt {\blue {which\: makes\: it\: complicated!! }}}$

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Thank you ❣️