# Assignments Class 8 for Algebraic Expressions and Identities Exercise 4

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Question 1

Use a suitable identity to get each of the following products.

(a) (p - 11) (p + 11)

(b) (2y + 5) (2y - 5)

(c) (12a - 9) (12a+)

(d)

(e) (1.1m - 0.4) (1.1m + 0.4)

(f)

(g) (6x - 7) (6x + 7)

(h)

(i)

(j) (3a + 9b) (3a - 9b)

(k) 2(a - 9

(l) 5(xy - 3z

(m) (6x+5y

(n)

(o)

(p)

Question 2

Use the identify (x + a) (x + b) =to find the following products.

(i)

(ii)

(iii)

(iv)

(v)

(vi)

Question 3

Simplify the following

(i)

(ii)

(iii)

(iv)

(v)

(vi)

(vii)

Question 4

Using identities, evaluate.

(a)

(b)

(c)

(d)

(e)

(f)

(i)

(j)

(k)

(l)

(m)

(n)

(o)

Question 5

Find the value of x if 8x=

Question 6

(a) If , find the value of

(b) If p + q =13 and pq = 22, then