Math, asked by sarthak9675, 11 months ago

(7a²-63b²) =?
answer fast​

Answers

Answered by Sukhada20
20

Answer:

7(a²-9b²)

7(a-9b) (a+9b)

Answered by pulakmath007
4

SOLUTION

CORRECT QUESTION

TO DETERMINE

To factorise

 \sf 7 {a}^{2}  - 63 {b}^{2}

EVALUATION

Here the given expression is

 \sf 7 {a}^{2}  - 63 {b}^{2}

We factorise it as below

 \sf 7 {a}^{2}  - 63 {b}^{2}

 \sf  = 7 ({a}^{2}  - 9 {b}^{2} )

 \sf  = 7  \{{(a)}^{2}  -  {(3b)}^{2}  \}

 \sf  = 7  (a + 3b)(a - 3b)

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