Toán Lớp 8: Rút gọn biểu thức sau:
A= |-3|+2+15x khi x <= 0
B= |-3x^2|- 8x^2+|x-2| khi x >= 2
C= |x-7|+2x – 3 khi x<7
D= |-3x -2|- 8x^2 + x-2 khi x<= -2/3
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Toán Lớp 8: Rút gọn biểu thức sau:
A= |-3|+2+15x khi x <= 0
B= |-3x^2|- 8x^2+|x-2| khi x >= 2
C= |x-7|+2x – 3 khi x<7
D= |-3x -2|- 8x^2 + x-2 khi x<= -2/3
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