Asked by Anonymous
evalaute the expression
Given 3x2 + 2x – y, evaluate when x = -5 and y = 7
Given 3x2 + 2x – y, evaluate when x = -5 and y = 7
Answers
Answered by
IB student
The answer is - 47
This is how i did it:
3X2=multiple 3 x (-5) x 2= -15 x 2 = -30
2X-y = 2 x (-5) - 7= -10 - 7= -17
Add the two answers: -30 + (-17)= -47
This is how i did it:
3X2=multiple 3 x (-5) x 2= -15 x 2 = -30
2X-y = 2 x (-5) - 7= -10 - 7= -17
Add the two answers: -30 + (-17)= -47
Answered by
Steve
I think what was meant is
3x^2 + 2x - y
3(25) + 2(-5) + 7 = 72
3x^2 + 2x - y
3(25) + 2(-5) + 7 = 72
Answered by
Steve
3(25) + 2(-5) - 7 = 58
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