Math, asked by singla8875, 7 months ago

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

Answers

Answered by ramandhamija
1

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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