simplify the following expression and evaluate as directed (5x-8y) (9x +4y) for x =2 and y= -1
Answers
Answered by
1
252
Step-by-step explanation:
(5×(2) - 8×(-1) ) × ( 9×(2)+4×(-1) )
10 + 8 × 18 - 4
18 × 14
= 252
Answered by
3
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
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