y^3-7y^2+8y-13 for y=2
answer= -31
8-7(4)+8(2)-13
8-28+16-13=
Put those numbers into a calculator to solve.
-49
No
To find the value of the expression y^3 -7y^2 +8y -13 for y=2, you substitute y=2 into the expression and simplify.
1. Substitute y=2 into each term of the expression:
y^3 - 7y^2 + 8y - 13
= (2)^3 - 7(2)^2 + 8(2) - 13
2. Simplify each term:
= 8 - 7(4) + 8(2) - 13
= 8 - 28 + 16 - 13
= -20 + 16 - 13
= -4 - 13
= -17
Therefore, the value of the expression y^3 -7y^2 +8y -13 for y=2 is -17.