Polynomials?

Question

(x-2)(x-5)
how do you solve that?

Answer 1

You just multiply it through.
1. The first x times the second x
2. The first x times -5
3. The -2 times the second x
4. The -2 times the -5


Make sure you keep track of the positive and negative values, negative times negative equals positive, etc.

Answer is x^2 -7x +10

Answer 2

This is a trick commonly known as FOIL - "first, outside, inside, last".

first: This means you multiply the first terms in each bracket. In this case, it's x times x, or x^2.

outside: Multiply the outside terms; that is, the x in the left bracket and the -5 in the right bracket. It's x times (-5), or -5x

inside: Multiply the inside terms: the second term in the first bracket and the first term in the second bracket. -2 times x = -2x

last: Multiply the second terms of each bracket. -2 times -5 = 10

So we have

x^2 - 5x -2x + 10
x^2 -7x + 10

Answer 3

Foil it out which will be X^2 - 7x + 10

Answer 4

use distributive property.
x times x, x times -5, -2 times x, -2 times -5


solution : xsquared - 7x + 10

* yeah foil!

Answer 5

mathematically you cannot solve that.......you can FOIL it............but to solve you need to have an actual equation and not just a polynomial expression