Question

please answer this asap! I will mark as brainliest! please​

Answer 1

Answer: a = 1/2

Step-by-step explanation:

f(x) = 4x³ +3x² + 12ax - 5

divided by x - 1

x = 1

f(1) = 4(1)³ + 3(1)² + 12a(1) - 5 ( USING REMAINDER THEOREM)

= 4 + 3  + 12a -5

=7 - 5 +12a

=2 + 12a (R1)

= 2 + 12a = R1

g(x) = 2x³ + ax² - 6x - 2

divided by x -2

x-2 =0

x = 2

g(2) = 2(2)³ + a(2)² - 6(2) - 2

       = 2(8) + 4a - 12 -2

       = 16 + 4a - 14

        = 2 + 4a

2 + 4a = R2  

Now we know that 3R1 + R2 - 28 = 0

3(2 + 12a) + 2 + 4a -28 =0

6 +36a + 2 +4a = 28

40a + 8 = 28

40a = 28 -8

40a = 20

a =1/2

Now mark me braniest

Answer 2

Answer:

Check it out ! Hope it will hep u !