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Let x △ y be defined by x △ y=x−5y. What is the value of 3 △  (−4)
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Let x △ y be defined by x △ y=x−5y. What is the value of 3 △  (−4)

User Mathwizurd
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x\Delta y=x-5y\\\\3\Delta(-4)\qquad\text{put the values x = 3 and y = -4 to the expression x - 5y}:\\\\3\Delta(-4)=3-5(-4)=3+20=23

User Firuzeh
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