Answer:A
Step-by-step explanation:
4x^2+7=25
Collect like terms
4x^2=25-7
4x^2=18
Divide both sides by 4
4x^2/4=18/4
x^2=9/2
Take the square root of both sides
x=√(9/2)
x=3/√(2)
multiply the answer by √2/√2
x=3/√(2) x √2/√2
x=3√(2)/√(4)
x=3√(2)/2
