Use the quadratic formula to write a quadratic equation that has the solutions x=15+-√-215/22

Matching

We can write several relationships.

... -b = 15

... 2a = 22

... b²-4ac = -215

The first of these gives b=-15; the second gives a=11. Then the third gives

... (-15)² -4·11·c = -215

... -44c = -440

... c = 10

So, the quadratic equation is 11x² -15x +10 = 0.

cross multiplying, we get :

⇒ (3) × (5) = (9) × (x)

⇒ 15 = 9x