Question

If x=4,is the root of a quadratic equation 3x^2+kx-2=0 then k=?

Answer 1

Answer:

Here is your answer in this image

Answer 2

Step-by-step explanation:

• put x=4 in equation given
• put x=4 in equation given 3x2+kx-2=0
• put x=4 in equation given 3x2+kx-2=03(4)2+k(4)-2=0
• put x=4 in equation given 3x2+kx-2=03(4)2+k(4)-2=048+4k-2=0
• put x=4 in equation given 3x2+kx-2=03(4)2+k(4)-2=048+4k-2=046+4k=0
• put x=4 in equation given 3x2+kx-2=03(4)2+k(4)-2=048+4k-2=046+4k=04k=46
• put x=4 in equation given 3x2+kx-2=03(4)2+k(4)-2=048+4k-2=046+4k=04k=46k=46/4
• put x=4 in equation given 3x2+kx-2=03(4)2+k(4)-2=048+4k-2=046+4k=04k=46k=46/4k=23/2