Salutare!
1) 5x + 5y = 5 • (x + y)
2) 4a - 4b = 4 • (a - b)
3) 12x + 48y = 12 • (x + 4y)
4) -xa - a = a • (-x - 1)
Sau varianta cand scoatem factor comun -a
-xa - a = - a • (x + 1)
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Valoarea expresiei
(2m + 6) • n =
m = -2
n = 3
(-2 • 2 + 6) • 3 = (-4 + 6 ) • 3 = 2 • 3 = 6
x - 2xy =
x = 5
y = -1
5 - 2 • 5 • (-1) = 5 - 10 • (-1) = 5 + 10 = 15
==pav38==
