\(\text{ax + ay + bx + by = a.(x + y) + b.(x + y) = (a + b).(x + y) = 10.(-2) = -20} \)
Chúc em học tốt!!!
Ta có : Ax + ay + bx + by
= a.( x + y) + b.( x+ y)
=( x +y ) ( a +b)
= -2. 10
= -20
hok tốt
Ta co:
ax+ay+bx+by
=a.(x+y)+b.(x+y)
=(a+b).(x+y)
=10.(-2)=-20
Ta có:ax+ay+bx+by
=b*(x+y)+a*(x+y)
=(b+a)*(x+y)
= 10*(-2)=-20
k mình nhé
ax+ ay +bx + by
= a.(x+y) + b.(x+y)
= (x+y). (a+b)
=(-2) . 10
=-20
\(ax+ay+bx+by\)
\(=a.\left(x+y\right)+b.\left(x+y\right)\)
\(=\left(a+b\right).\left(x+y\right)\)
\(=10\times\left(-2\right)\)
\(=-20\)