Question

If a = -35, b = 10 cm and c = -5, verify that:

(i) a + (b + c) = (a + b) + c
(ii) a × (b + c) = a × b + a × c

Answer 1

Explanation:

(i). a+(b+c) = (a+b)+c

-35+(10-5) = (-35+10)+(-5)

-35+5 = -25-5

-30 = -30

(ii). a×(b+c) = a×b + a×c

-35 × [10+(-5)] = -35×10 + -35×-5

-35 × (10-5) = -350 + 175

-35 × 5 = -350 + 175

-175 = -175