Thursday

December 18, 2014

December 18, 2014

Posted by **Anonymous** on Tuesday, April 27, 2010 at 10:23pm.

2x^2-21x+36+x^2

=3x^2-21x+36

...i'm not sure what to do after that, could you help and show the steps please

- math -
**Ana**, Tuesday, April 27, 2010 at 11:11pm3x^2-21x+36 GCF: 3, so divide the whole thing by 3.

x^2-7x+12

(What two #s add up to -7 and multiplied equal 12? 3 and 4)

[x^2-4x] - [3x+12]

x(x-4) - 3(x-4)

(x-4)(x-3)=0

x-4= 4 x-3= 3 Answer X=3 and 4

- math -
**Reiny**, Tuesday, April 27, 2010 at 11:17pmI thought it said, factor fully.

You had

3x^2 - 21x + 36 , which is correct

= 3(x^2 - 7x + 12)

= 3(x-4)(x-3)

nothing was said about "solving" the equation, since there was no equation.

**Answer this Question**

**Related Questions**

algebra 2 - I am trying to factor the expression -8y^2+28y-60 but can't get an ...

Math - Simplify I came up with 5.5 (15x^5-21x^4+21x^2)/(3x^2 ) not sure if I did...

algebra - factor the following equation: 6x^2 - 21x - 9 i've tried to factor it ...

Intermediate Algebra - Am I going in the right track? 8x -1/x + 5x - 3/2x = 16x^...

Algerbra - how do you solve 7(3x+4)=8(2x+5)+13 expand the parenthesis...I will ...

inequality expresion - The cost of a long distant telephone call is $0.36 for ...

algerbra - 7(3x+4)=8(2x+5)+13 how would I start a equation like this would it be...

Pre Cal - find the domains of the following functions: a) f(x)=x^20 b) g(x)=1/(x...

Algebra - Is this right? 7(3x-2)=70 21x-14=70; 21x-14+14=70+14; 21x=84; x=4

Algebra - Is this right? 7(3x-2)=70 21x-14=70; 21x-14+14=70+14; 21x=84; x=4