Karinaivanovaxm0ask
a fost răspuns

3х2 - 13x+14=0
16х2 - 8x+1=0
(x+4)2=3x+40
помогите плиз!!​

Răspuns :

Nobody79ask

Răspuns:

1. x=20/13

2. x=33/8

3. x=32

Sper ca e corect!

Vezi imaginea Nobody79
Vezi imaginea Nobody79
PutereDinuask

1) 3x²-13x+14=0

3x²-6x-7x+14=0

3x(x-2)-7(x-2)=0

(x-2)(3x-7)=0

⇒ x₁=2

⇒ x₂=7/3

S={2, 7/3}

2) 16x²-8x+1=0

(4x-1)²=0

4x-1=0

4x=1

⇒ x=1/4

3) (x+4)²=3x+40

x²+8x+16=3x+40

x²+8x+16-3x-40=0

x²+5x-24=0

x(x+8)-3(x+8)=0

(x+8)(x-3)=0

⇒ x₁=-8

⇒ x₂=3

S={-8, 3}

Ask Alte intrebari