Question

Expand the following
(3x-2y +4) (3x- 2y -4)

Answer 1

Step-by-step explanation:

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

3x(3x-2y+4)-2y(3x-2y-4)+4(3x-2y-4)9x^2-6xy-12x-6xy+4y^2+8y+12x-8y-16

3x(3x-2y+4)-2y(3x-2y-4)+4(3x-2y-4)9x^2-6xy-12x-6xy+4y^2+8y+12x-8y-169x^2+4y^2-12xy-16

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Answer 2

Answer:

9x^2 - 12xy +4y^2 -16

Step-by-step explanation:

here we can use this formula, (a-b+c) (a-b-c)

now (3x-2y+4)(3x-2y-4)=9x^2 -6xy -12x -6xy +4y^2 +8y +12x- 8y -16 = 9x^2 -12xy +4y^2 -16