Question

4.selesaikan persamaan dengan rumus abc
a. x = 4 dan x = -2
b. x = -8 dan x = 2
c . x = 8 dan x = -2
d. x = 2 dan x = -8
e. x = 1 dan x = 2​

Answer 1

Jawaban:

a. x = 4 dan x = -2

=

(x−4)(x+2)=0

=

x2−2x−8=0

=

a=1

b=−2

c=−8

b. x = -8 dan x = 2

=

(x+8)(x−2)=0

=

x2+6x−16=0

=

a=1

b=6

c=−16

c. x = 8 dan x = -2

=

(x−8)(x+2)=0

=

x2−6x−16=0

=

a=1

b=−6

c=−16

d. x = 2 dan x = -8

=

(x−2)(x+8)=0

=

x2+6x−16=0

=

a=1

b=6

c=−16

e. x = 1 dan x = 2

=

(x−1)(x−2)=0

=

x2−3x+2=0

=

a=1

b=−3

c=2