Question

Express-2/-7 in rational number whose denominater is a) 7 , b) -63 ,c) 14 ,d) -42​

Answer 1

Answer:

c) 14

Step-by-step explanation:

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Answer 2

Step-by-step explanation:

(a) Denominator of -2/-7 is -7.

By what number should we devide (-7) to get 7?

Clearly, such number is -7/7 is -1.

So, we multuply it's numerator and denominator by -1.

.•. -2/-7 = (-2× -1) / (-7× -1) = 2/7

Hence, -2/-7 = 2/7.

(b) -7/63 is -9.

-2/-7 = (-2 ×-9) / (-7 × -9) = 18/63

Hence,-2/-7 = 18/63

(c) -7/14 is -2.

-2/-7 = (-2×-2) / (-7×-2) = 4/14

Hence, -2/-7 = 4/14.

(d) -7/-42 is 6.

-2/-7 = (-2×6) / (-7×6) = -12/-42

Hence, -2/-7 = -12/-42