Factorise 8 +6(p+q)-5(p+q)^2
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let p+ q = x
- 5x^2 + 6x + 8
= - (5x^2 - 6x - 8)
= - ( 5x^2 - 10x + 4x - 8)
= - { 5x(x-2) + 4(x-2) }
= - (5x+4)(x-2)
= - {5(p+q) + 4}{(p+q) - 2}
- 5x^2 + 6x + 8
= - (5x^2 - 6x - 8)
= - ( 5x^2 - 10x + 4x - 8)
= - { 5x(x-2) + 4(x-2) }
= - (5x+4)(x-2)
= - {5(p+q) + 4}{(p+q) - 2}
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