Question

Anyone can solve my question .
question 20 to 25 anyone ...solve it pls ..​by cross product method ..

Answer 1

(a-b)x+ (a+b)y=2a^2-2b^2

ax-bx+ay+by=2a^2-2b^2.....eq1

(a+b)(x+y)=4ab

ax+ay+bx+by=4ab....eq2

by elimination method,,

ax-bx+ay+by=2a^2-2b^2

ax+bx+ay+by=4ab

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2ax+2ay+2by=2a^2-2b^2+4ab