Let me work out 8.5
1. Let us factorise the following algebraic expressions :
(i) (a + b)2 – 5a - 5b + 6
(
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Answer:
( a+ b )2 - 5a - 5b +6
let( a+b )be x
x2 -5x +6
x2 - (3+2) x +6
x2 -3x -2x +6
x( x-3) - 2 ( x-3)
( x-3) ( x-2)
( a+ b-3) ( a+ b -2)
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