Question

Which of the following quadratic equations have x= 3 as one of its roots

(A) x-8x +15-0

(B) x+8x+15-0

(C) x-8x -15-0

(D) x+8x -15-0


please answer fast it's urgent and pls answer correc only if you know it's correct answer than only answer it or pls don't answer any sh*t​

Answer 1

Answer : (A) ✔✔

Explaination :

As there is giving that x = 3 is one of roots of the following equation so when we put x = 3 in the equation then it will satisfy the equation or answer will be zero.

We start with first equation :

(1)

${x}^{2} - 8x + 15 = 0 \\ \\ = > {(3)}^{2} - 8 \times 3 + 15 = 0 \\ \\ = > 9 - 24 + 15 = 0 \\ \\ = > - 15 + 15 = 0 \\ \\ = > 0 = 0$

It satisfies the equation (1) it means x = 3 is one root of the first equation which is

${x}^{2} - 8x + 15 = 0$

I hope it will help you ☺

Fóllòw Më ❤

Answer 2

Answer:

The correct answer is (A) part