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Workout the value for 3x^2-5y when x=3 and y=4, i think the answer is 61 because : 3*3=9, 9^2=81, 5*4=20, 81-20=61 I just want to make sure that my answer is correct, can you pls tell me if it’s correct?
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4 votes
Workout the value for 3x^2-5y

when x=3 and y=4, i think the answer is 61 because :

3*3=9,
9^2=81,
5*4=20,

81-20=61


I just want to make sure that my answer is correct, can you pls tell me if it’s correct? I’ll give you 10 points hehe

User Coffee Bite
by
7.9k points

1 Answer

6 votes
Remember to do PEMDAS so your answer is not correct, since you multiplied before doing the parentheses/exponents.

Step-by-step explanation:
3(3)^2- 5(4)
= 3(9) - 5(4)
= 27 - 20 = 7
User Crthompson
by
7.3k points
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