If x=-1 and y=1, then y4+x3+y2+x=
A)-4
B)0
C)4
D)10

Name: If x=-1 and y=1, then y4+x3+y2+x= A)-4 B)0 C)4 D)10
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Quizplus · Accepted Answer

It is simply putting values with due care of positive and negative sign
y4+x3+y2+x= 14+(-1)3+(1)2+(-1) = 1 -1+1-1 =0
Key takeaway: Remember simple rules of multiplication of positives (+) and negative (-) numbers. When you raise (-1) by an odd number you get negative sign and when you raise (-1) by an even number you get positive sign
(-1) = -1 (-1)2 = +1 (-1)3 = -1

If X=-1 and Y=1, Then Y4+x3+y2+x=