Telangana SCERT Solution Class VIII (8) Math Chapter 11 Algebraic Expressions Exercise 11.3
Contents
(1) Multiply the binomials:
(i) 2a-9 and 3a+4
(ii) x-2y and 2x-y
(iii) kl + lm and k-l
(iv) m2 – n2 and m + n
(2) Find the product:
(i) (x + y) (2x – 5y + 3xy)
(ii) (a – 2b + 3c) (ab2 – a2b)
(iii) (mn-kl+km) (kl-lm)
(iv) (p3 + q3) (p – 5q + 6r)
(3) Simplify the following:
(i) (x-2y) (y – 3x) + (x + y) (x-3y) – (y-3x) (4x-5y)
(ii) (m + n) (m2 – mn + n2)
(iii) (a – 2b + 5c) (a – b) – (a – b – c) (2a + 3c) + (6a + b) (2c – 3a – 5b)
(iv) (pq-qr+pr) (pq+qr) – (pr+pq) (p+q-r)
(4) If a, b, c are positive real numbers such that a+b+c/c = a-b+c/b = -a+b+c/a, find the value of (a+b)(b+c)(c+a)/abc