Question

If (k - 2) is a factor of x +9x² + bx + 18 and a-b = 7, find a and b.
please give a correct answer in step by step process..
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Answer 1

Step-by-step explanation:

k-2=0

k=2

x +9x² + bx + 18

a-b = 7,

2+9×2×2+2b+18

2+36+18+2b

58+2b

2b=-58

b=-29

a-b=7

a+29=7

a=7-29

a=-22

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Answer 2

Answer:

HERE,

(k- 2) is a factor of x +9x² +bx + 18 and a-b = 7

then,

= k -2 = 0

= k= 2

Now we put the value of k in x +9x² + bx +18

= 2+ 9×2×2+ b×2+ 18

= 38+ +2b +18

= 58+ 2b

= 2b = -58

= b = -58/2

= b= -29

Now we put the value of b in a- b = 7

= a - (-29) = 7

= a +29 = 7

= a = 7 - 29

= a = -22

Step-by-step explanation:

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