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01-09-2018
Mathematics

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

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konrad509 konrad509

01-09-2018

[tex] 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) [/tex]

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