New Learning Composite Mathematics SK Gupta Anubhuti Gangal Class 8 Algebraic Expressions Self Practice 5B Solution
(1) Find the product of the following pairs of monomials.
(a) 5, 2x
(b) -3y, 4y
(c) -6p, -8pqr
(d) 12p5, -5p
(2) Find the area of a rectangle whose length is 6x3y2 units and breadth is 3xy2 units.
(3) Simplify:
(a) (3y3 ) (-3y2)
(b) (-8x5) (2x)
(c) (-4m2n) (-3mn2)
(d) (x4) (x3) (x)
(e) (-4a) (5ab) (3b)
(f) (-x3y2) (xy) (2y)
(g) (-1/3 a3) (9a) (-2a4)
(h) (-q)3 (2q)2
(i) (2x)2 (3x)3
(j) (-4z) (-5z2)3
(k) (-3y)2 (-3y)3
(l) (-0.5a2b) (-2ab)3
SOLUTION Number 1, 2 & 3:
(4) Find a monomial equivalent to the given expression.
(a)( 4a3b2) (3a3b4) + (2ab)6
(b) (4x3) (2x)4 – (7x)2 (3x5)
(c) (5p2) (-2q) (3q) + (7p2) (2q2) + (-3p) (-5p) (4q2)
(d)(- 3xyz) (4x2yz) – (5y2) (2xz2) (-x2)
SOLUTION Number 4:
Wow