Question

2. Verify the following:
(a) 18 x 17 +(-3)] = [18 x 7] + [18 (-3)]
(b) (-21) [(-4) + (-6)] = [(-21) (-4)] + [(-21) (-6)]​

Answer 1

I do not know this is so long.

Answer 2

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a) ✔︎

$18 \times 17 + ( - 3) = (18 \times 7) + (18( - 3)) \\ 306 + (- 3) = 126 + ( - 54) \\ 303 = 72$

left hand side is not equal to right hand side ✔︎

b) ✔︎

$( - 21)(( - 4) + ( - 6)) = (( - 21)( - 4) + (( - 21)( - 6)) \\ ( - 21) \times 10 = 84 + 126 \\ 210 = 210$

left hand side is equal to right hand side ✔︎

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