Question

Select the correct answer.
What are the solutions to this equation?

Answer 1

the answer is D, x=–1 & x=1

because when we put –1 & 1 in the place of variable x it will be correct as following

when x=–1 16*–1^2+9=25

16*–1*–1+9=25

16*1+9=25

16+9=25

25=25 √

& when x=1 16*1^2+9=25

16*1+9=25

16+9=25

25=25 √