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= -4x -10x +5y +y
= -14x +6y
b. (5x +7) -3(2x -5)
= 5x +7 -6x +15
= 5x -6x +7 +15
= -x +22
c. 8x -2(-4x +7)
= 8x +8x -14
= 16x -14
d. -3(2x -5) +2(-x +4)
= -6x +15 -2x +8
= -6x -2x +15 +8
= -8x +23
e. 2x² -3x +5 -3x² +x -9
= 2x² -3x² -3x +x +5 -9
= -x² -2x -4
Itu jawabannya.