Question

2a(a + b) – b(2a– b) – b(b + 1) при а = - 0,3 и b = - 0,4.

Answer 1

= 2a^2+2ab - 2ab + b^2 -b^2 - b = 2a^2 - b

Если a=-0.3 b= =0,4, то 2 * (-0,3)^2 - (-0,4) = 0.18 + 0.4 = 0.58

Answer 2

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Answer 3

неправильно