Question

simplify the following expression and evaluate as directed (5x-8y) (9x +4y) for x =2 and y= -1​

Answer 1

252

Step-by-step explanation:

(5×(2) - 8×(-1) ) × ( 9×(2)+4×(-1) )

10 + 8 × 18 - 4

18 × 14

= 252

Answer 2

Answer:

answer= 252

Step-by-step explanation:

(5x-8y) (9x+4y)

put x= 2 and y= -1

=(5×2 - 8×{-1} ) (9×2 + 4×{-1})

=(10+8)(18 - 4)

=18 × 14

=252