Question

15a^2-10ab/3ab-2b^2 при а= -3 b=0.2

Answer 1

Ответ:

15a^2-10ab / 3ab-2b^2=5a*(3a-2b) / b*(3a-2b)=5a / b. подставляем значения:  5*(-3) / 0,2= (-15) / 0,2= -75. Ответ: (-75).

Объяснение:

Answer 2

To evaluate the expression 15a^2 - 10ab / 3ab - 2b^2 with a = -3 and b = 0.2, we substitute the given values into the expression:

15a^2 - 10ab / 3ab - 2b^2

Let's calculate it step by step:

1. Substitute a = -3 and b = 0.2 into the expression: 15(-3)^2 - 10(-3)(0.2) / 3(-3)(0.2) - 2(0.2)^2

2. Simplify the expression within each set of parentheses: 15(9) - 10(-0.6) / 3(-0.6) - 2(0.04)

3. Perform the multiplications: 135 - (-6) / -1.8 - 0.08

4. Simplify further: 135 + 6 / -1.8 - 0.08

5. Perform the addition and subtraction: 141 / -1.88

Finally, divide 141 by -1.88: -75

Therefore, when a = -3 and b = 0.2, the expression 15a^2 - 10ab / 3ab - 2b^2 equals -75.