3(5a-2)-4(3a-3)求计算!

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3(5a-2)-4(3a-3)求计算!3(5a-2)-4(3a-3)求计算!3(5a-2)-4(3a-3)求计算!3(5a-2)-4(3a-3)=15a-6-12a+12=3a+6原式=15a-6-1

3(5a-2)-4(3a-3)求计算!
3(5a-2)-4(3a-3)求计算!

3(5a-2)-4(3a-3)求计算!
3(5a-2)-4(3a-3)
=15a-6-12a+12
=3a+6

原式=15a-6-12a+12
=3a+6

3(5a-2)-4(3a-3)
=15a-6-12a+12
=3a+6

3(5a-2)-4(3a-3)
=15a-6-12a+12
=3a+6

=(3×5a-3×2)-(4×3a-4×3)
=(15a-6)-(12a-12)
=15a-6-12a+12
=3a+6