Question

(1/5ab-2)(1/4ab+2);a=1 and b=-1.​

Answer 1

Answer:

= -77/20

Step-by-step explanation:

(1/5x1x(-1)-2)(1/4x1x(-1)+2)

(-1/5-2)(-1/4+2)

(-1-10/5)(-1+8/4)

-11/5 x 7/4

= -77/20

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