Saturday

April 19, 2014

April 19, 2014

Posted by **Nat** on Saturday, March 15, 2008 at 6:32am.

2(4x + 3)(4x - 3) - (4x + 3)squared

p.s i couldn't find a squared symbol so only the last bracket is squared, not the whole equation.

- Maths -
**Reiny**, Saturday, March 15, 2008 at 7:17am2(4x + 3)(4x - 3) - (4x + 3)squared

we usually write it this way

2(4x + 3)(4x - 3) - (4x + 3)^2

= 2(16x^2 - 9) - (4x + 3)(4x + 3)

= 2(16x^2 - 9) - (16x^2 + 24x + 9)

= 32x^2 - 18 - 16x^2 - 24x - 9

= 16x^2 24x - 27

or you could take out a common factor from

2(4x + 3)(4x - 3) - (4x + 3)^2

= (4x + 3)(2(4x-3) - (4x+3))

= (4x+3)(8x-6-4x-3)

= (4x+3)(4x-9)

= 16x^2 - 36x + 12x - 27

= 16x^2 - 24x - 27

not saying the second way is any easier, just another way to show it

**Related Questions**

math - Hi, me and my friend think two completely different answers to the same ...

Maths - Can someone give me the checkpoint exam topics that are required for a ...

MATHS - Critical help please. Level 3 maths algebraic methods is really hard. Q...

maths - trigonometry - I have my maths exam on Tuesday and cannot remember how ...

Maths - Hey :) I'm sitting my maths non-calculator GCSE tomorrow and am ...

MATHS - if a student scores 58 in a maths exam predict the score they would get ...

algebra - I keep getting different answers to this 1 question..hoping some1 can ...

math - you are given an exam with only 9 questions. if each question has 4 ...

Maths - determine if this is a function? y= x show working method please

Maths - 45% is 28 100%=? Please show me the concept and the working out as well ...