a. (ײ+4×-1) -(2ײ+4×) b. 2(×+2y-×y) +5(2×-3y+5×y) c. (5a-6+ab) -(a+2ab-1)
Matematika
sitinurhalimah112
Pertanyaan
a. (ײ+4×-1) -(2ײ+4×)
b. 2(×+2y-×y) +5(2×-3y+5×y)
c. (5a-6+ab) -(a+2ab-1)
b. 2(×+2y-×y) +5(2×-3y+5×y)
c. (5a-6+ab) -(a+2ab-1)
1 Jawaban
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1. Jawaban newwiguna
A. (ײ+4×-1) -(2ײ+4×)
= x² + 4x - 1 - 2x² - 4x
= -x² - 1
B. 2(×+2y-×y) +5(2×-3y+5×y)
= 2x + 4y - 2xy + 10x - 15y + 25xy
= 2x + 10x + 4y - 15y - 2xy + 25xy
= 12x - 11y + 23xy
C. (5a-6+ab) -(a+2ab-1)
= 5a - 6 + ab - a - 2ab + 1
= 5a - a + ab - 2ab - 6 + 1
= 4a - ab - 5