1.

Do this sum in brief ​

Answer»

ANSWER:

Step-by-step explanation:

  • -15/4 x (3/7 + -12/5) = ( -15/4 x 3/7) + (-15/4 x -12/5)
  • -15/4 x (-69/35) = (-15/4 x 3/7) + (-15/4 x -12/5)
  • Multiplying a NEGATIVE and a POSITIVE equals a negative:(-) x (+) = (-)
  • -15/4 x (-69/35) = (-45/28) + (-15/4 x -12/5)
  • Multiplying TWO negatives equals a positive: (-) x (-) = (+)
  • -15/4 x (-69/35) = (-45/28) + (3/4 x 12)
  • (3 x 3) = 9
  • -15/4 x (-69/35) = (-45/28) + 9
  • -15/4 x (-69/35) = - 45/28 + 9
  • 15/4 x 69/35 = - 45/28 + 9
  • 3/4 x 69/7 = - 45/28 + 9
  • 3/4 x 69/7 = - 45/28 + 9
  • 207/28 = 207/28
  • ∴ true

MARK AS BRAINLIEST



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