Please factorise 8(5x+9y)²+12(5x+9y). Please explain in brief.
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Answered by
18
8(5x+9y)²+12(5x+9y)
4(5x+9y){2(5x+9y) +3}
20x+36y(10x+18y+3)
4(5x+9y){2(5x+9y) +3}
20x+36y(10x+18y+3)
Answered by
7
=8(25x^2+81y^2+90xy)+60x+45y
=200x^2+648y^2+720xy+60x+45y
=200x^2+648y^2+60x+45y+720xy
=200x^2+648y^2+720xy+60x+45y
=200x^2+648y^2+60x+45y+720xy
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