Question

find the answers fastly​

Answer 1

Answer:

1) option b

2) option b

3) option d

Step-by-step explanation:

1)8x²-14x-15=0

8x²-20x+6x-15=0

4x(2x-5)+3(2x-5)=0

(4x+3)(2x-5)=0

x= -3/4 or x=5/2

2)x²+x=306

x(x+1)=306

x(x+1)=17×18

x=17

x(x+1)= -18×-17

x= -18

x= 17 or -18

3)f(x)=2x²+9x+k

f(3)=2(3)²+9(3)+k=0

18+27+k=0

45+k=0

k= -45

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Answer 2

Answer:

1 .b

2. b

3.d

Step-by-step explanation:

hope this helps you..