Question

calculati valoarea expresiei E= 2a - 3b + 5c pentru ; A) a = 12 , b = 15 , c = 21 . B) a = -14 , b= 18 , c = 24 . C) a = - 10 , b = - 16 , c = 9 . D) a = - 23 , b = - 19 , c = - 30 . E ) a= 25 , b = - 7 , c = - 26

Answer 1

a). E=2x12-3x15+5x21=24-45+105=84
b).
E=2x-14-3x18+5x24=-28-54+120=-82+120=38
c)E=2x-10-3x-16+5x9=-20+48+45=73
d) E=2x-23-3x-19+5x-30=-46+57-150=-139
e)E=2x25-3x-7+5x-26=50-21-130=-101