Question

(6+а)^2 -а(а+7) при а = - 0,6

Answer 1

= (6+a)(6+a) - a(a+7) = 36 + 12a + a^2 - a^2 - 7a = 36 + 5a = 36 - 5 * 0.6 = 36 - 3 = 33

Answer 2

To evaluate the expression (6 + а)^2 - а(а + 7) when а = -0.6, we simply substitute the value of а into the expression and then perform the calculations.

Let's do the math step by step:

1. Substitute а = -0.6 into the expression: (6 + (-0.6))^2 - (-0.6)(-0.6 + 7)

2. Simplify the expression inside the parentheses: (5.4)^2 - (-0.6)(6.4)

3. Calculate the squares and the product: (29.16) - (-0.6 * 6.4)

4. Perform the multiplication: 29.16 + 3.84

5. Add the numbers together: 33.00

So, when а = -0.6, the expression (6 + а)^2 - а(а + 7) equals 33.00.