Factorise the following algebraic expressions completely a. y4 −81 . x2 +10x +24

asked Nov 4, 2019 116k views

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$y^4-81=(y^2-9)(y^2+9)=(y-3)(y+3)(y^2+9)\\\\ x^2 +10x +24 =x^2+10x+25-1=(x+5)^2-1=(x+5-1)(x+5+1)=(x+4)(x+6)$

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