Question

which of √2 and 2 isa zero of polynomial p(x)=x square-2x​

Answer 1

Answer:

it's easy to explain

Step-by-step explanation:

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

Answer 2

p(x)=x²-2x

subtitute x=√2

»(√2)²-(2×√2)

»2-2√2≠0

substitute x=2

»(2)²-(2×2)

»4-4=0

2 is the zero of the polynomial x²-2x