Bantu jawab dongg plis​

Jawaban:

1) x^2 – 3x + 2 = 0

( x – 1 ) ( x -2) = 0

akarnya

x – 1 = 0

x1 = 1

x – 2 = 0

x2 = 2

2) x² -7x + 12

= x² -3x -4x + 12

= x ( x-3 ) -4 ( x-3)

= ( x-4 ) ( x-3 )

3) x² – 3x -4 = 0

a) 1

b) -3 = -4 + 1

c) -4 = -4 × 1

( x – 4 ) ( x + 1 ) = 0

R1 -4 = 0 / R2 + 1 = 0

R1 = 4

R2 = -1

Hp = ( 4 , – 1 )

4) x²-4x-12 = 0

( x-6 ) ( x +2 ) = 0

x–6 = 0 / x+2 = 0

x = 6

x = -2

5) 2x² + x-10

= 2x² + 1x – 10

= 2x²+ ( -4 + 5 )x -10

= 2×2-4x + 5x -10

= 2x ( x-2 ) + 5 ( x-2 )

= ( 2x + 5 ) ( x-2 )

6) x² – 3x -4 = 0

a) 1

b) -3 = -4 + 1

c) -4 = -4 x

( x -4 ) ( x +1 ) = 0

R1 -4 = 0 / R2 + 1 = 0

R1 = 4

R2 = -1

Hp = ( 4 , -1 )

7) 2x² – 5x – 3 = 0

2x² + x – 6x -3 = 0

x ( 2 x + 1 ) – 3( 2x + 1 ) = 0

( x -3 ) ( 2x + 1 ) = 0

x -3 = 0

x1= 3

2x + 1 = 0

2x = -1

x² = -1/2

*semoga membantu