find the value of a polynomial 5 x - 4×2+3at x=2and x=1
Answers
Step-by-step explanation:
The value of a polynomial obtained on putting a particular value of the variable is called the value of the polynomial.
(i) p(x) = 5x – 4x² + 3
On putting x = 0 ,
p(0) = 5(0) – 4(0)² + 3
= 0 – 0 + 3
=3
p(0) = 3
(ii) p(x) = 5x – 4x² + 3
On putting x= -1,
p(-1) = 5(-1) – 4(-1)²+ 3
= -5 – 4(1) + 3
= -5 – 4 + 3
= -9 + 3
= -6
p(-1) = -6
(iii) p(x) = 5x – 4x² + 3
On putting x = 2
p(2) = 5(2) – 4(2)² + 3
= 10 – 16 + 3
= -6 + 3
p(2) = -3
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Answer: -3 and 4
Step-by-step explanation:
p(x) = 5x – 4x² + 3
- On putting x = 2
p(2) = 5(2) – 4(2)² + 3
= 10 – 16 + 3
= -6 + 3
p(2) = -3
-On putting x= 1,
p(1) = 5(1) – 4(1)²+ 3
= 5 – 4(1) + 3
= 5 – 4 + 3
= 4
p[1] = 4