Question

A rectangle is 6cm long and 5 cm wide. When each dimension is increased b x cm, the area is tripled. Fid the value of x.

Answer 1

(x+6)(x+5) = 3(30)
Solve.

Answer 2

4

Answer 3

add four to 6 and four to 5:

10(9)=90

so four is the right answer, I solved the equation. :)

Answer 4

x^2 +11x +30=90 ?