4x²-3x=52
x²-3x/4=13
x²-3x/4+(3/8)²=13+(3/8)²
(x-3/8)²=841/64
x=(3+√841)/8或x=(3-√841)/8
x=(3+29)/8或x=(3-29)/8
x=4或x=-13/4
4x^2-3x=52
两边同除以4得:
x²-3/4x=13
两边同+9/64得:
x²-3/4x+9/64=13+9/64
(x-3/8)²=841/64=(29/8)²
x-3/8=±29/8
x=(3±29)/8
x=4或x=-13/4
4x^2-3x=52
(2x)²-3x+(3/4)²=52+9/16
(2x-3/4)²=841/16
2x-3/4=±4分之29
2x=8 或2x= -2分之13
x=4或x= -4分之13