Question

find (5x + 2)² + (5x - 2)²
using suitable identities​

Answer 1

Answer:

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Step-by-step explanation:

property less

(5x+2y) ²+(5x−2y) ²

=25x²+4y²+20xy+25x²+4y²−20xy

=50x²+8y²

If you want property you can use

${( a + b)}^{2} = {a}^{2} + {b}^{2} + 2ab$

and

${( a - b)}^{2} = {a}^{2} + {b}^{2} - 2ab$

here a = 5x and b = 2 substitute in formula and equation you get the same answer