Question

For the quadratic equation xsquare+6x=16,what should be third term to make LHS a complete square?​

Answer 1

Answer:

9

Step-by-step explanation:

$x^{2} +6x=16\\x^{2} +6x+9=16+9\\(x+3)^{2} =25$

Answer 2

Step-by-step explanation:

xsquare + 6x - 16

(x)^2+2(3)(x)-(4)^2

the third term should be +9

so that x^2+6x+9=(x+3)^2,a perfect aquare