Question

3(2x-y)× 2(x+4y)-5(2x-3y) при х= 3 у= -1

Answer 1

Сама решила не списывала

Answer 2

3(2*3-(-1))× 2(3+4(-1))-5(2*3-3(-1)) =-87

Answer 3

To evaluate the expression 3(2x-y) × 2(x+4y) - 5(2x-3y) when x = 3 and y = -1, we simply substitute the given values for x and y into the expression and perform the arithmetic operations. Let's do the calculations step by step:

Step 1: Replace x with 3 and y with -1 in the expression. Expression: 3(2(3) - (-1)) × 2(3 + 4(-1)) - 5(2(3) - 3(-1))

Step 2: Perform the operations inside the parentheses. Expression: 3(2(3) + 1) × 2(3 - 4) - 5(2(3) + 3)

Step 3: Continue with the arithmetic. Expression: 3(6 + 1) × 2(-1) - 5(6 + 3)

Step 4: Perform the multiplications. Expression: 3(7) × (-2) - 5(9)

Step 5: Complete the remaining multiplications and subtraction. Expression: 21 × (-2) - 45

Step 6: Finally, calculate the result. Expression: -42 - 45

Step 7: Final answer: Expression: -87

So, when x = 3 and y = -1, the value of the expression 3(2x-y) × 2(x+4y) - 5(2x-3y) is -87.