(2x+5y)whole square - ( x+3y) whole square.
plzz answer and explain
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hope it will help ................
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dainvincible1:
u din't simplify the list line
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(2x+5y)²-( x+3y)²
⇒{(2x)²+2*2x*5y+(5y)²}-{ x²+2*x*3y+(3y)²}
⇒(4x²+20xy+25y)-(x²+6xy+9y)
⇒4x²+20xy+25y-x²-6xy-9y
⇒4x²-x²+20xy-6xy+25y-9y
⇒3x²+14xy+16y
⇒{(2x)²+2*2x*5y+(5y)²}-{ x²+2*x*3y+(3y)²}
⇒(4x²+20xy+25y)-(x²+6xy+9y)
⇒4x²+20xy+25y-x²-6xy-9y
⇒4x²-x²+20xy-6xy+25y-9y
⇒3x²+14xy+16y
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