Question

de la teste de evaluare:2,3,4 si 5.Please.Maine am test si nu le inteleg.Dau coroana si inimioara!va roogg

Answer 1

$2).4(x + 3) {}^{2} - 7 = 29 \\ 4(x + 3) {}^{2} = 29 + 7 \\ 4(x + 3) {}^{2} = 36 \\ (x + 3) {}^{2} = 9 \\ x + 3 = 3 \\ x + 3 = - 3 \\ x1 = - 6 \\ x2 = 0 \\ \\ 4).2(x - 2)(x + 2) + 8 = x {}^{2} + 9 \\ 2(x {}^{2} - 4) + 8 = x {}^{2} + 9 \\ 2x {}^{2} - 8 + 8 = x {}^{2} + 9 \\ 2x {}^{2} = x {}^{2} + 9 \\ 2x {}^{2} - x {}^{2} = 9 \\ x {}^{2} = 9 \\ x1 = - 3 \\ x2 = 3$