Math, asked by kritikatoshniwal9, 5 months ago

factorise : 7(3a - b)² - 28(2a - b)²

right answer pls

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Answers

Answered by krishna456123
1

Answer:

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Step-by-step explanation:

Given:−

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

2

−28(2a−b)

2

\text {➺(21a-7b)}^2 {-(56a-28b)}^2➺(21a-7b)

2

−(56a−28b)

2

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

➻Usingformula:−

\boxed {{➺a}^2 -{b}^2 {=(a+b) (a-b)}}

➺a

2

−b

2

=(a+b)(a−b)

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

➻Where,

\text {➺a=(21a-7b)}➺a=(21a-7b)

\text {➺b=(56a-28b)}➺b=(56a-28b)

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

➻Applyingformula:−

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

\text {➺(77a-35b) (21a-7b-56a+28b)}➺(77a-35b) (21a-7b-56a+28b)

\text {➺(77a-35b) (-35a+21b)}➺(77a-35b) (-35a+21b)

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

➻HenceSimplified

_________________________

\sf {\mathtt {\blue {!

__________________________

Thank you ❣️

Answered by Sweetgirl965302
2

Answer:

Hi dear ❤️❤️...

Step-by-step explanation:

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