Question

1. Use a suitable identity to get each of the
following products :
(i) (x+5)(x+5)
(ii) (3a +8)(3a+8)
3
3
(iii) (3a-5)(3a-5)
(iv) 5x
5x -
2
2
(v) (3.1a -0.5)(3.1a +0.5) (un) (x +y?)(-x+y?)
(vii) (6x-7)(6x+7) (viii) (-x+y)(-x+y)
(ix) (8a-5b)(8a-5b)
(x) (x-5)
(xi) (ab + 5c)? (xii) (6a2-7b)
(xiii) (3x + 5)(3x +2) (xiv) (4x + 7y)(4x + 5y)
(xv) (2x2 +7)(2x² +9) (xvi) (abc-5)(abc-8).​

Answer 1

Answer:

1. (a+b)(a+b)= a²+ b²

(x+5)(x+5) = x² + 5²