Question

S4 puntele b c d urgent,dau coroana

Answer 1

b)

$a_{33}=y^2+6$

$b_{33}=2y$

$a_{21}=3\\\\b_{12}=-6$

$y^2+6+2y=9\\\\y^2+2y-3=0\\\\\Delta=4+12=16\\\\y_1=1\\\\y_2=-3$

c)

-2x-2x²=6-10

-2x²-2x=-4

2x²+2x-4=0 |:2

x²+x-2=0

Δ=1+8=9

x=1 si x=-2

Un alt exercitiu cu matrice gasesti aici: https://brainly.ro/tema/9685683

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