Question

Calculati (a-b)*c, stiind ca a*c = √3 si b*c = -2
Calculati (a+b+c)*d, stiind ca a*d = -3, b*d = -0,1 si c*d = √17 Dau coroana cine ma ajuta primul
Va rog mult ajutatima !!

Answer 1

1.Rezolvare :
$a \times c = \sqrt{3}$
$b \times c = - 2$
$(a - b) \times c$
$= a \times c - b \times c$
$= \sqrt{3} - ( - 2)$
$= \sqrt{3} + 2$
2.Rezolvare :
$a \times d = - 3$
$b \times d = - 0.1$
$c \times d = 17$
$(a + b + c) \times d$
$= a \times d + b \times d + c \times d$
$= - 3 + ( - 0.1) + 17$
$= - 3 - 0.1 + 17$=13,9.