Question

If y = -2, find the value of 2y³ - y² + 5y - 1​

Answer 1

Given: y = -2

then,

2y³ - y² + 5y - 1

= 2(-2)³ - (-2)² + 5(-2) - 1

= 2 × -8 - 4 - 10 - 1

= -16 - 15

= -31

Answer 2

Answer:

2y^3-y^2+5y-1

=2×(-2×-2×-2)-(-2×-2)+5×-2-1

=2×-8-4-10-1

=-16-15

=-31

HOPE IT HELPS