1)x^2+9x+14=0 2)2x^2-23x+65=0 3)2x^2-27x+88=0 4)x^2-5x+6=0 5)x^2-14x+49=0 6)x^2-9x+14=0 7)x^2+4x=0 8)3x^2-9=0 9)4x^2-8=0 10)x^2-6x=0

Question

Алгебра: 1)x^2+9x+14=0 2)2x^2-23x+65=0 3)2x^2-27x+88=0 4)x^2-5x+6=0 5)x^2-14x+49=0 6)x^2-9x+14=0 7)x^2+4x=0 8)3x^2-9=0 9)4x^2-8=0 10)x^2-6x=0

Юлдуз1122 · Answer

5. D=(-14)^2-4×1×49=0x1,x2= 76. D=(-9)^2-4×1×14=25x1=7 x2= 27. x(x+4)=0x=0 x=-48. 3(x^2-3)=0x=+-√39. 4(x^2-2)=0x=+-√210. x(x-6)=0x=0 x=6...