Question

show that (7a-5b)^2+70ab=(7a+5b)^2. using identities

please answer correct only
very important​

Answer 1

➠ Given ( 7a - 5b )^2 + 70ab = ( 7a + 5b )^2

Rearranging the given equation

we get

➠ ( 7a - 5b )^2 - ( 7a + 5b )^2 = -70 ab

Taking L.H.S

➠ 49a^2 - 35ab + 25b^2 - 49a^2 - 35ab - 25b^2

➠- 35ab - 35ab

➠ - 70ab

R.h.S

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show that (7a - 5b) + 140ab = (7a + 5b)². using identites

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