Question

(5x-     )(5x+    )=    -7y ² Дополните пожалуйста

Answer 1

(5x-√7y)(5x+√7y) = 25x²-7y²

Answer 2

To expand the expression (5x- )(5x+ ) and simplify the right-hand side of the equation -7y², we need to find the missing terms in the binomials:

To multiply the two binomials, we can use the FOIL method, which stands for First, Outer, Inner, Last:

(5x - )(5x + ) = 25x² +

Now, to solve for y, we need to isolate y² on one side of the equation. We can do this by dividing both sides of the equation by -7:

(25x² + )/(-7) = y²

Simplifying the expression on the left-hand side of the equation:

-25/7 x² + = y²

Therefore, the complete expression is:

(5x - )(5x + ) = -25/7 x² +

Note that the missing terms in the binomials are +5x and -5x, respectively.