# Polynomials (3a-5)(2a-3)

### Polynomials (3a-5)(2a-3)

Expand and simplify
(3a-5)(2a-3)

how do i do these kind of questions?!?!?!
Guest

### Re: Polynomials (3a-5)(2a-3)

3a * 2a + 3a*(-3) + (-5)*2a + (-5)*(-3) = 6a2 - 6a - 10a + 15 = 6a2 - 16a + 15

Do you understand the simplify rule?

Math Tutor

Posts: 410
Joined: Sun Oct 09, 2005 11:37 am
Reputation: 28

### Re: Polynomials (3a-5)(2a-3)

How will you simplify this:

(a-4)(6a-8) = ?

Math Tutor

Posts: 410
Joined: Sun Oct 09, 2005 11:37 am
Reputation: 28

### Re: Polynomials (3a-5)(2a-3)

$$6a^2-24a-8a+32=6a^2-32a+32$$
Guest

### Re: Polynomials (3a-5)(2a-3)

Equations is : (3a-5)(2a-3)

For the expansion of this equation we have to multiply each term to another term :

(3a * 2a) - (5 * 2a) - (3a * 3) + (5 * 3)

=> 6a^2 - 10a - 9a + 15
=> 6a^2 - 19a + 15

manoj9585

Posts: 11
Joined: Tue May 22, 2012 1:56 am
Reputation: 2

### Re: Polynomials (3a-5)(2a-3)

Math Tutor wrote:How will you simplify this:

(a-4)(6a-8) = ?

It is $$(a-4)(6a-8)=2(a-4)(3a-4)=2(3a^2-4a-12a+16)=2(3a^2-16a+16)=6a^2-32a+32$$ perfectmath

Posts: 25
Joined: Fri Jun 29, 2012 12:21 am
Location: Vietnam
Reputation: 1