Question

PLZZZ HELPPPPPPP LAST QUESTIONS LAST CHANCE FOR POINTSSSS REWARD BRAINLIESTT

Answer 1

Answer:

17)x=12, -7

18)x=+2, -2

19)(2x-5)(3x+1)

20)3(5x+4)(x-2)

Step-by-step explanation:

17) (x-12)(x+7)=0

x=12, -7

18)3x^2-12=0

3x^2=12

x^2=4

x=+2, -2

19)(ax+b)(cx+d)

Ax^2+Bx+C

A=6, B=-13, C=-5

ac=6

ad+bc=-13

bd=-5

a=2

b=-5

c=3

d=1

(2x-5)(3x+1)

20)3(5x^2-6x-8)

=3(5x+4)(x-2)

Hope I helped! And also, is this really college math? I'm in middle school and I know how to do it!

Can you give me brainliest, since I did all of them?

Answer 2

Answer:

question 19

(2x-5)(3x+1)

Step-by-step explanation:

question 19

6x^2-13x-5

6x^2 coefficient = 6

-13x coeddicient = -13

-5 is constant

multiply coefficient of first term by the constant

i.e. 6*-5= -30

get 2 factors of -30 whoose sum equals -13

-15 +2 = -13

rewrite to have

6x^2-15x+2x-5

3x(2x-5) the firs term

1(2x-5)

add up,

(3x+1)(2x-5)