Question

А(5в-2с)-в(5а+2с) Если А=5.1 В=5.2 с= -8

Answer 1

=5ав-2ас-(5ав+2вс)=5ав-2ас-5ав-2вс=-2ас-2вс

(-2*5.1*(-8))-(2*5.2*(-8))=81,6-(-83,2)=81,6+83,2=164,8

Answer 2

To evaluate the expression А(5в-2с)-в(5а+2с) with the given values А=5.1, В=5.2, and с= -8, we simply need to substitute these values into the expression and perform the arithmetic operations.

Let's proceed step by step:

1. Substitute the given values: А(5в-2с) - в(5а+2с) = 5.1(5(5.2) - 2(-8)) - 5.2(5(5.1) + 2(-8))

2. Perform the arithmetic operations inside the parentheses: 5.1(5(5.2) - 2(-8)) = 5.1(26 + 16) = 5.1 * 42 = 214.2

5.2(5(5.1) + 2(-8)) = 5.2(25 - 16) = 5.2 * 9 = 46.8

3. Substitute the results back into the expression: А(5в-2с) - в(5а+2с) = 214.2 - 46.8

4. Perform the final subtraction: 214.2 - 46.8 = 167.4

So, when А=5.1, В=5.2, and с= -8, the expression А(5в-2с)-в(5а+2с) equals 167.4.