Question 2b Verify the following -21 -4-6-21 -4-21 -6-

L.H.S. =( 21) × [( 4)+( 6)] = ( 21) × [ 4 6]=( 21) × [ 10] = 210 R.H.S = [( 21) × ( 4)]+[( 21) × ( 6)] = 84+126=210 ( 21) × [( 4)+( 6)]=[( 21) × ( 4)] + [( 21) ...

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Standard VII

Mathematics

Negatives and Reciprocals

Question 2b V...

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Question 2(b)
Verify the following
$(- 21) \times [(- 4) + (- 6)] = [(- 21) \times (- 4)] + [(- 21) \times (- 6)]$

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Solution

L.H.S. = $(- 21) \times [(- 4) + (- 6)] = (- 21) \times [- 4 - 6] = (- 21) \times [- 10] = 210$
R.H.S = $[(- 21) \times (- 4)] + [(- 21) \times (- 6)] = 84 + 126 = 210$
$(- 21) \times [(- 4) + (- 6)] = [(- 21) \times (- 4)] + [(- 21) \times (- 6)]$

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Standard VII Mathematics

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Question 2(b) Verify the following (−21)×[(−4)+(−6)]=[(−21)×(−4)]+[(−21)×(−6)]

L.H.S. =(−21)×[(−4)+(−6)]=(−21)×[−4−6]=(−21)×[−10]=210 R.H.S = [(−21)×(−4)]+[(−21)×(−6)]=84+126=210 (−21)×[(−4)+(−6)]=[(−21)×(−4)]+[(−21)×(−6)]

Question 2(b)
Verify the following
$(- 21) \times [(- 4) + (- 6)] = [(- 21) \times (- 4)] + [(- 21) \times (- 6)]$

L.H.S. = $(- 21) \times [(- 4) + (- 6)] = (- 21) \times [- 4 - 6] = (- 21) \times [- 10] = 210$
R.H.S = $[(- 21) \times (- 4)] + [(- 21) \times (- 6)] = 84 + 126 = 210$
$(- 21) \times [(- 4) + (- 6)] = [(- 21) \times (- 4)] + [(- 21) \times (- 6)]$