Jawaban:

1. P(2, -3)

2. x= 1

3. (1, 0) dan (-7, 0)

4. x^2 + 12x + 36 = 0

5. x^2 - 6x =0

Penjelasan dengan langkah-langkah:

1. f(x)= -x^2 + 4x - 7

a= -1. b= 4 c= -7

x=absis= -4/-2 = 2

y= ordinat = - (16-28)/-4 =-3

2. y= x^2 - 2x -3

x= -b/2a = 2/2 = 1

3. y= x^2 + 6x - 7

(x- 1)(x+ 7)

x1= 1

x2= -7

4. P(-6, 0) dan A(0, 6)

6=a(0+6)^2 + 0

6=a(36)

a = 1/6

y=1/6(x+6)^2 + 0

y= 1/6(x^2 + 12x + 36)

=1/6 x^2 + 2x + 6 atau rasionalisasi

x^2 + 12x + 36 = 0

5. A(0, 0) B(6, 0) C(3, 4)

4=a(3-0)(3-6)

4=a(3)(-3)

4=-9a

a= -4/9

y=-4/9(x-0)(x-6)

y=-4/9(x^2 - 6x)

y=-4/9 x^2 - 24/9 x

= 4x^2 - 24x

x^2 - 6x =0