Question

find the roots of 2x^2-11x+15=0 by using graph​

Answer 1

Answer:

2x^2-6x-5x+15=0

2x(x-3)-5(x-3)=0

(x-3)(2x-5)=0

x-3=0 or 2x-5=0

x=3 or x=5/2

Answer 2

hi mate,

solution:

Factoring 2x²-11x+15

2x² - 6x - 5x - 15

Step-1 : Add up the first 2 terms, pulling out like factors :

2x • (x-3)

Add up the last 2 terms, pulling out common factors :

5 • (x-3)

Step-2 : Add up the four terms of step 1 :

(2x-5) • (x-3)

Which is the desired factorization

Final result :

(x - 3) • (2x - 5)

x -3=0 and 2x-5=0

x=3 and x= 5/2

I hope it helps you.