multiply the sum of 6/7 and -13/21 by their difference
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Answer:
155/441
Step-by-step explanation:
sum = 6/7 + -13/21 (lcm = 21)
= 6×3/7×3 + -13/21
= 18/21 + (-13/21)
=5/21
Difference = 6/7 - (-13/21) [lcm = 21]
=18/21 - (-13/21)
=31/21
multiplication = 31/21 × 5/21
=155/441
hope its helpful
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