Question

aceste două exerciţii.
vă rooog mult!​

Answer 1

1. a) -1/4x²y×2xy=-2/4x³y²=-1/2x³y²

b) 0,6ab²×5a²b=3a³b³

c) 2x³y×(-1/√2)y=-2/√2x³y²=2√2/2x³y²=√2x³y³

d) -3√18ab×√2/3a³b²=-9√2×√2a⁴b³=-18a⁴b³

2. a) 12xy÷3x=4y

b) -2/27x³y⁴÷1/9x²y=(-2/27×9/1)xy³=-18/27xy³=-2/3xy³

c) 0,1a⁴b²÷(-5ab²)=1/10÷(-5)a³=1/10×(-1/5)a³=-1/50a³

d) 1,(5)a⁶b⁷÷0,(5)a³b⁵=14/9×9/5a³b²=14/5a³b²