Question

(x-y)(x+y)+2(2x-y)+3​

Answer 1

(x-y)(x+y)+2(2x-y)+3=х^2-у^2+4х-2у+3
P.S.:(x-y)(x+y) - по формуле
2(2x-y) -умножение фонтанчиком,т.е. 2*2х-2*у=4х-2у

Answer 2

To simplify the expression "(x-y)(x+y) + 2(2x-y) + 3," we'll start by expanding the first two terms and then simplify the entire expression:

1. Expand (x-y)(x+y): (x - y)(x + y) = xx + xy - yx - yy = x^2 + xy - xy - y^2 = x^2 - y^2

2. Now the expression becomes: x^2 - y^2 + 2(2x - y) + 3

3. Distribute 2 to (2x - y): 2 * 2x - 2 * y = 4x - 2y

4. Combine like terms: x^2 - y^2 + 4x - 2y + 3

The simplified expression is: x^2 - y^2 + 4x - 2y + 3.