A) By completing the square, find in terms of the constant k the roots of the equation x^2 +kx -6 = 0 (4 marks) b) Hence find the exact roots of the equation x^2 + 4x - 6 = 0 (2 marks)

if you use photomath right away it will give you the answer not like this app that you have to wait for people.

the answer is d on edge

step-by-step explanation:

hello from mrbilldoesmath!

answer:

25x^2 + 90x + 84

discussion:

mn(x) = m(n(x)) = m( 5x + 9) =

(5x + 9)^2 + 3 =>

25x^2 + 90x + 9^2 + 3 =

25x^2 + 90x + 84                 (as 9^2 = 9*9 = 81)

which is the second choice

regards,  

mrb

p.s.   i'll be on vacation from friday, dec 22 to jan 2, 2019. have a great new year!

step-by-step explanation:

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