8+6 (a+b)-5 (a+b)2 factorise it's urgent plz help me out
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Step-by-step explanation:
Let a + b = x
(a + b)2 = x2
8 + 6 (a + b) – 5 (a + b)2
= 8 + 6x – 5x2
= 8 + 10x – 4x – 5x2
= 2(4 + 5x ) – x (4 + 5x)
= (4 + 5x) (2 – x)
= [4 + 5(a + b)] [2 – (a + b)]
(Substituting the value of x)
= [4 + 5a + 5b] [2 – a – b]
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