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If 15 and –16 are roots of a quadratic equation. then the equation is:
Question

If 15 and –16 are roots of a quadratic equation. then the equation is:

A.

x² – x – 240 = 0

B.

x² + x – 240 = 0

C.

x² + x + 240 = 0

D.

x² – 2x + 240 = 0

Correct option is B

Given:

Roots of the quadratic equation: 15 and -16

Formula used:

If α\alpha​ and β\beta​ are the roots of the quadratic equation, the equation can be written as:

(x−α)(x−β)=0

Solution:

α=15

β=−16

(x−15) (x+16)=0

x2x^2​(x+16)−15(x+16) = 0

x2x^2 +16x−15x−240 = 0

x2x^2 +xx -240 = 0

​The quadratic equation with roots 15 and -16 is

x2+x240=0x^2 +x-240=0​​

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