Question

(x2 - y)(z + 4

I don't understand this question so can u help me.

Answer 1

Distribute x2 to z+4 and then -y.

x2z+4x-yz-4y

Answer 2

Hello!

Answer:

`\Large \boxed{\sf x^2z + 4x^2 - yz - 4y}`

Explanation:

We want to simplify the following expression:

`\sf (x2 - y)(z + 4)`

We know that
`\sf (a-b)(c+d)` is equal to
`\sf ac+ad-bc-bd`.

In our expression:

`\sf a = x^2 \\b = y\\c = z\\d = 4`

▪ So the expression is equal to:

`\sf x^2 * z + x^2 * 4 - y * z - y * 4`

Simplify:

`\boxed{\sf x^2z + 4x^2 - yz - 4y}`

Conclusion:

The expression (x² - y)(z + 4) is equal to x²z + 4x² - yz - 4y.