Question

解方程与不等式(1)(x-3)(x-2)+18=(x+9)(x+1)(2)(3x+4)(3x-4)<9(x-2)(x+3)

Answer 1

(1)(x-3)(x-2)+18=(x+9)(x+1)
x^2-5x+6+18=x^2+10x+9
15x=15
x=1
(2)(3x+4)(3x-4)<9(x-2)(x+3)
9x^2-16<9x^2+9x-54
9x>38
x>38/9

Answer 2

（1） x^2-5x+6+18=x^2+10x+9,
15x=15,x=1
(2) 9x^2-16<9x^2+9x-54
9x>38,x>38/9

Answer 3

（1）x^2-5x+24=x^2+10x+9
x=1
(2)9x^2-16<9x^2+9x-54
x>38/9