Question

if -1 is a zero of x^2-ax+b then value of a+b is

Answer 1

Answer

The value of a+b is -1

Given

The quadratic polynomial is :

• x² - ax + b
• -1 is a zero of the polynomial

To Find

• The value of a + b

Solution

Given -1 is a zero of polynomial x² - ax + b

$\sf \therefore (-1)^{2} - a(-1) + b = 0 \\\\ \sf\implies 1 + a + b = 0 \\\\ \sf\implies a+b=-1$

Therefore , required value of a+b is -1

Answer 2

Answer:

step by step explanation:

x² - ax + b = 0

-1² - (-1 a) + b = 0

1 + 1a + b = 0

1a + b = -1

a + b = -1/1

a + b = -1

so you can take any no. as a and b like Linear equation in two variables. like (−0.25) + (−0.75) = -1....

Hope it helps.....

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