Question

Help me please!! This is timed and I’m stuck

Answer 1

Answer:

• B. 13/2

Step-by-step explanation:

Given equation:

• 2x² + 7x - 15 = 0

It has roots r and s.

We know how to find the sum and product of roots.

Sum of roots:

• r + s = -7/2

Product of roots:

• rs = -15/2

Use the above two equations to work out the value of r - s:

• $r - s = \sqrt{(r - s)^2} =$
• $\sqrt{(r+s)^2-4rs} =$
• $\sqrt{(-7/2)^2-4(-15/2)} =$
• $\sqrt{169/4} =13/2$

Correct choice is B

Answer 2

Answer:

D is the correct answer

Step-by-step explanation: