Sagot :
1: 3(15a-4)
45a-12
2:2(x-3y)
2x-6y
3:25a(4a+3+2b)
100a²+75a+50ab
4:4x(2x+5)
8x²+20x
5:2/3(3a+5)
2a+3.33
6:3/5(10-15b)
6-9b
voila !
Bonjour,
[tex]3\left(15a-4\right) = 3\times 15a - 3\times 4 = 45a-12[/tex]
[tex]2\left(x-3y\right) = 2\times x - 2\times 3y = 2x-6y[/tex]
[tex]25a \left(4a+3+2b\right) = 25a\times 4a + 3\times 25a + 25a \times 2b\\ = 100a^2 +50ab +75a[/tex]
[tex]4x\left(2x+5\right) = 4x\times 2x +4x\times 5 = 8x^2+20x[/tex]
[tex]\frac 23 \left(3a+5\right) = \frac 23 \times 3a +\frac 23 \times 5 = 2a+\frac{10}{3}[/tex]
[tex]\frac 35 \left(10-15b\right) = \frac 35\times 10- \frac 35 15b = 6 - 9b = -9b+6[/tex]