Question

Как раскрыть скобку (y-1)(y+2)?

Answer 1

(y-1)(y+2)= y(в квадрате) - 2y

Answer 2

Expanding the Expression (y-1)(y+2)

To expand the expression (y-1)(y+2), we can use the distributive property to multiply each term in the first set of parentheses by each term in the second set of parentheses.

The steps to expand the expression are as follows:

1. Multiply the first term in the first set of parentheses by each term in the second set of parentheses. 2. Multiply the second term in the first set of parentheses by each term in the second set of parentheses. 3. Combine like terms, if any, to simplify the expression.

Let's go through these steps:

1. Multiply the first term in the first set of parentheses by each term in the second set of parentheses: - (y) * (y) = y^2 - (y) * (2) = 2y

2. Multiply the second term in the first set of parentheses by each term in the second set of parentheses: - (-1) * (y) = -y - (-1) * (2) = -2

3. Combine like terms: - y^2 + 2y - y - 2 - Simplifying, we get: y^2 + y - 2

So, the expanded form of the expression (y-1)(y+2) is y^2 + y - 2.