Question

Найдите значение выражения:(5x-2)²+2y/2xy-3x Пожалуста Помагите​

Answer 1

Ответ: - 4/7

Объяснение:

x-5y=3

x=5y+3

x²-2xy-y²=-1

(5y+3)²-2(5y+3)y-y²=-1

(25y²+2*5y*3+9)-(10y²+6y)-y²=-1

25y²+30y+9-10y²-6y-y²=-1

14y²+24y+10=0

7y²+12y+5=0

(7y+5)(y+1)=0

y = -1  или y = -5/7

x=5y+3

x= -2 или х =5*( -5/7) + 3 = -25/7 + 3 = - 4/7

Answer 2

Finding the Value of the Expression

To find the value of the expression (5x-2)² + 2y/2xy-3x, we can break it down and solve it step by step.

Step 1: Expand and Simplify (5x-2)²

The expression (5x-2)² can be expanded using the formula (a-b)² = a² - 2ab + b².

Expanding (5x-2)²: (5x-2)² = (5x)² - 2 * 5x * 2 + (-2)² (5x-2)² = 25x² - 20x + 4 [[2 #]]

Step 2: Simplify 2y/2xy-3x

The expression 2y/2xy-3x can be simplified by factoring out the common terms.

Simplifying 2y/2xy-3x: 2y/2xy-3x = 2y/2x(y-3) 2y/2xy-3x = y/(xy-3x) [[4 #]]

Step 3: Putting it All Together

Now, we can put the simplified expressions together to find the value of the original expression.

The original expression: (5x-2)² + 2y/2xy-3x

Substituting the simplified expressions: (25x² - 20x + 4) + (y/(xy-3x))

This is the simplified form of the original expression.

Conclusion

The value of the expression (5x-2)² + 2y/2xy-3x is (25x² - 20x + 4) + (y/(xy-3x)).