Question

Find the value of k, if = 2 is a zero of () = 2

+ + 2.​

Answer 1

Step-by-step explanation:

xyz

If the triangle ABC in the Question 7 above is revolved about the side 5 cm, then find

the volume of the solid so obtained. Find also the ratio of the volumes of the two

solids obtained in Questions 7 and 8.

Answer 2

Given polynomial p(x)=2x2−3x+7a is zero polynomial if x is 2

Replace x by 2 we get

∴2(2)2−3(2)+7a=0

⇒2×4−3×2+7a=0

⇒8−6+7a=0

⇒2+7a=0

Add -2 both sides we get

2+7a−2=0−2

⇒7a=−2

Divided by 7 both side we get

a=−72

So a=−72