Factorise
a) 4x square +17x +15
b) 2x square - 15x -22
c) 8x square -22x + 15
please help me
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Step-by-step explanation:
a)4x^2+17x+15
=4x^2+12x+5x+15
=4x(x+3)+5(x+3)
=(4x+5)(x+3)
b)2x^2-15x-22
=2x^2-11x-4x-22
=x(2x-11)-2(2x-11)
=(x-2)(2x-11)
c)8x^2-22x+15
=8x^2-10x-12x+15
=2x(4x-5)-3(4x-5)
=(2x-5)(4x-5)
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