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Show that x = 1 is a zero of the polynomial 3x3 – 4x2 + 8x- 7 I want answer please class 9 maths number system blesson

## Answers

Answered by

4

__Given :-__

3x³ - 4x² + 8x - 7

__To Prove :-__

1 is a zero

__Solution :-__

Putting x = 1

0 = 3(1)³ - 4(1)² + 8(1) - 7

0 = 3(1) - 4(1) + 8(1) - 7

0 = 3 - 4 + 8 - 7

0 = 11 - 11

0 = 0

Hence

x = 1 is a zero of the given polynomial

Answered by

1

**Step-by-step explanation:**

Given x=1

3x3-4x2+8x-7

3(1)3-4(1)2+8(1)-7

3(1)-4(1)+8(1)-7

3-4+8-7

11-11

=0

hence given one is zero of the polynomial

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