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Joshaa340
a fost răspuns

Ex 3 va rog dau coronita

Ex 3 Va Rog Dau Coronita class=

Răspuns :

Myssy
A
3*5+7(a+b)=15+7*13=15+91=106
B
X(a+b)-50=5*13-50=65-50=15
C
10*5-4(a+b)=50-4*13=50-52=-2
D
{4(a+b)-2*5}*{2(a+b)+5}=(4*13-10)*(2*13+5)=(52-10)*(26+5)=42*31=1302
3. a)
3 * x + 7 * a + 7 * b = 106
3 * x + 7 * ( a + b) = 106
3 * 5 + 7 * 13 = 106
15 + 91 = 106

b)
x * a + x * b - 50 = 15
x * (a + b) - 50 = 15
5 * 13 - 50 = 15
65 - 50 = 15

c)
10 * x + (4 * a + 4 * b) = 102
10 * x + (4 * [a + b]) = 102
10 * 5 + (4 * 13) = 102
50 + 52 = 102

d)
(4 * a + 4 * b - 2 * x) * (2 * a + 2 * b + x) = 882
(4 * [a * b] - 2 * x) * (2 * [a + b] + x) = 882
(4 * 13 - 2 * 5) * (2 * 13 + 5) = 882
(52 - 10) * (26 + 5) = 882
42 * 21 = 882

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