Question

125(a-3b3)-2 a-2b4 при a =0,2 b=0,5

Answer 1

125(0,2-4,5)-0,4-4
125×(-4,3)-0,4-4
-537,5-0,4-4
-541,9

Answer 2

To evaluate the expression 125(a - 3b^3) - 2a - 2b^4 with the given values of a and b (a = 0.2, b = 0.5), simply substitute those values into the expression and perform the calculations:

125(a - 3b^3) - 2a - 2b^4 = 125(0.2 - 3 * 0.5^3) - 2 * 0.2 - 2 * 0.5^4 = 125(0.2 - 3 * 0.125) - 2 * 0.2 - 2 * 0.5^4 = 125(0.2 - 0.375) - 0.4 - 2 * 0.5^4 = 125(-0.175) - 0.4 - 2 * 0.5^4 = -21.875 - 0.4 - 2 * 0.5^4 = -21.875 - 0.4 - 2 * 0.0625 = -21.875 - 0.4 - 0.125 = -22.4 - 0.125 = -22.525

So, when a = 0.2 and b = 0.5, the expression evaluates to -22.525.