multiply the two binomial below
(2x-3)(2x+3)
the answer is 4x^2+9
is this correct
6 answers
Did you forget -6x?
a) 4x^2+9
B) 4x^2-9
c) 4x^2-6x-9
d) 4x^2 -12x +9
B) 4x^2-9
c) 4x^2-6x-9
d) 4x^2 -12x +9
So what is your choice?
A is not correct.
Why did you throw out -3 * 2x?
Why did you throw out -3 * 2x?
(2x-3)*(2x+3)=2x*(2x-3)+3*(2x-3)
=4x^2-6x+6x+9
=4x^2+9
=4x^2-6x+6x+9
=4x^2+9
Sorry mistake:
(2x-3)*(2x+3)=2x*(2x-3)+3*(2x-3)
=4x^2-6x+6x-9
=4x^2-9
B is correct answer
(2x-3)*(2x+3)=2x*(2x-3)+3*(2x-3)
=4x^2-6x+6x-9
=4x^2-9
B is correct answer