Question

Find the roots of the equation 2x2 + x – 10 = 0​

Answer 1

Answer:

As light from a star races through our atmosphere, it bounces and bumps through the different layers, bending the light before you see it. Since the hot and cold layers of air keep moving, the bending of the light changes too, which causes the star's appearance to wobble or twinkle.

Answer 2

Answer:

2x

2

+x−10=0

⇒ 2x

2

+5x−4x−10=0

⇒ x(2x+5)−2(2x+5)=0

⇒ (2x+5)(x−2)=0

⇒ 2x+5=0 and x−2=0

⇒ x=−

2

5

and x=2

⇒ x=−2.5 and x=2

∴ x={−2.5,2}

Step-by-step explanation:

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