Simplify (0.4a + 1.2b) (-2.1a+1.1b) and verify when a=20 , b=30​

Question

Simplify (0.4a + 1.2b) (-2.1a+1.1b) and verify when a=20 , b=30​

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Liliana 1 month 2021-08-18T16:58:44+00:00 1 Answer 0 views 0

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    2021-08-18T16:59:51+00:00

    Step-by-step explanation:

    putting a= 20 and b= 30 in eq we get

    (0.4×20+1.2×30 )(-2.1×20+1.1×30)

    =(8+36)(-42+33)

    (44)(-9)

    =-396

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