Question

ajutati maaaa ex 2....​

Answer 1

Răspuns:

(a ²-4)x+13=2(2x+5)

x=-3

(a²-4)(-3)+13=2(-6+5)

(a²-4)(-3)=2×(-1)-13

(a²-4)(-3)=-2-13

a²-4=-15:(-3)

a²=4-+5

a²=9

a=3 raspuns = b)