3(2X+1)(2X-1)-4(3X+2)(3X-2)过程

2024-12-19 01:10:52
推荐回答(3个)
回答1:

3(2X+1)(2X-1)-4(3X+2)(3X-2)
=3(4x的平方-1)-4(9x的平方-4)
=12x的平方-3-36x的平方+16
=13-24x的平方

回答2:

3(2X+1)(2X-1)-4(3X+2)(3X-2)

=3(4x^2-1)-4(9x^2-4)
=12x^2-3-36x^2+16
=13-24x^2

回答3:

3(2X+1)(2X-1)-4(3X+2)(3X-2)
=3[(2X)^2-1]-4[(3X)^2-2^2]
=12X^2-3-36X^2+16
=13-24X^2