Răspuns :
a. (-3)^2 = 9 = a
c) 5+4^2 = 7a ⇒ 7a=21, a=3
e) 3-(-3)^2=5a-6(-3)^2
3-9 = 5a -54
5a= 54-6 = 48 ⇒ a=48/5
c) 5+4^2 = 7a ⇒ 7a=21, a=3
e) 3-(-3)^2=5a-6(-3)^2
3-9 = 5a -54
5a= 54-6 = 48 ⇒ a=48/5
a)x=-3
x^2=(-3)^2=9
a=9
c)x=4
5+x^2=7a
5+4^2=21
21=7a
a=3
e)x=-3
3-(-3)^2=5a-6(-3)^2
-6=5a-54
5a=54-6
5a=48
a=48/5
x^2=(-3)^2=9
a=9
c)x=4
5+x^2=7a
5+4^2=21
21=7a
a=3
e)x=-3
3-(-3)^2=5a-6(-3)^2
-6=5a-54
5a=54-6
5a=48
a=48/5