Question

1. Use a suitable identity to get each of the following products.
(i) (x + 3) (x + 3) (ii) (2y + 5) (2y + 5) (iii) (2a – 7) (2a – 7)

Answer 1

Answer:

x + 3) (x + 3)

(ii) (2y + 5) (2y + 5)

(iii) (2a - 7) (2a - 7)

(iv) (3a - 1/2)(3a - 1/2)

(v) (1.1m – 0.4) (1.1m + 0.4)

(vi) \left(a^{2}+b^{2}\right)\left(-a^{2}+b^{2}\right)

(vii) (6x - 7) (6x + 7)

(viii) (- a + c) (- a + c)

(ix) \left(\frac{1}{2} x+\frac{3}{4} y\right)\left(\frac{1}{2} x+\frac{3}{4} y\right)

(x) (7a - 9b) (7a - 9b)

Answer 2

Answer:

identity - (x+a) (x+b)=x²+(a+b)x+ab

Step-by-step explanation:

(x+3)(x+3)=x²+(3+3)x+3×3

=x²+3x+3x+9

=x²+6x+9 [ answer

Note: by using this identity you can solve the rest of questions by yourself

Hope it helps you:)