Question

A) 7*(-1)3 – 4*(-1)2 – 8;e) -10*(-0,3)2 - 5*(-0,3) + 1.​

Answer 1

А)

$7 \times ( - 1) \times 2 - 4 \times ( - 1) \times 2 - 8 = \\ = - 14 + 8 - 8 = - 14$

Е)

$- 10 \times ( - 0.3) \times 2 - 5 \times ( - 0.3) + 1 = \\ = 6 + 1.5 + 1 = 8.5$

Answer 2

To solve these expressions, let's evaluate them step by step:

A) 7*(-1)3 - 4*(-1)2 - 8:

First, we evaluate the exponent:

(-1)3 = -1 * -1 * -1 = -1

(-1)2 = -1 * -1 = 1

Now we substitute these values back into the expression:

7 * (-1)3 - 4 * (-1)2 - 8 = 7 * (-1) - 4 * 1 - 8 = -7 - 4 - 8 = -19

Therefore, the value of A) 7*(-1)3 - 4*(-1)2 - 8 is -19.

e) -10*(-0,3)2 - 5*(-0,3) + 1:

First, we evaluate the exponent:

(-0,3)2 = (-0.3) * (-0.3) = 0.09

Now we substitute this value back into the expression:

-10 * (-0,3)2 - 5 * (-0,3) + 1 = -10 * 0.09 - 5 * (-0.3) + 1 = -0.9 + 1.5 + 1 = 0.6 + 1 = 1.6

Therefore, the value of e) -10*(-0,3)2 - 5*(-0,3) + 1 is 1.6.