Question

find the solution of the following equation.

i) (k-4)(k-9)=0

ii) (x-5)(x+9)=0
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Answer 1

Answer:

(i) 9,4 (ii) -9,5

Step-by-step explanation:

(i) k^2 -13k +36

k^2 -(9+4)k+36

k^2-9k-4k +36

k(k-9)-4(k-9)

(k-9)(k-4)

k= 9 and 4

(ii) x^2+4x-45

x^2+(9-5)x-45

x^2+9x -5x -45

x(x+9) -5(x+9)

(x+9)(x-5)

x= -9 and 5

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