Question

x³ + 4x²+3x-21 , find the value at x=-5​

Answer 1

Answer:

-125+100+ (-15) - 21 (after putting -5 in the place of x)

-25-15 -21

-40-21

-61

hope it helps

Answer 2

=} x³ + 4x² + 3x - 21

=} (-5)³ + 4 × (-5)² + 3 × -5 - 21

=} -125 + (4 × 25) + (-15) - 21

=} -125 + 100 - 15 - 21

=} -25 - 36

=} -61