SOLUTION: Which of the following equations is quadratic? x(x2+ 1) = 0 5(4x+ 2) = 3 (x+ 3)(x+ 4) = 5

Algebra ->  Graphs -> SOLUTION: Which of the following equations is quadratic? x(x2+ 1) = 0 5(4x+ 2) = 3 (x+ 3)(x+ 4) = 5       Log On


   

Question 764520: Which of the following equations is quadratic?
x(x2+ 1) = 0
5(4x+ 2) = 3
(x+ 3)(x+ 4) = 5
Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!

x%28x%5E2%2B+1%29+=+0.....equations is not quadratic: when you multiply x%28x%5E2%2B+1%29+=+0 you will have x%5E3%2B+x+=+0 and you have the equation of degree 3
5%284x%2B+2%29+=+3.....equations is not quadratic: when you multiply 5%284x%2B+2%29+=+3 you will have 20x%2B+10+=+3 and you have the equation of degree 1

%28x%2B+3%29%28x%2B+4%29+=+5.....equations is quadratic: when you multiply %28x%2B+3%29%28x%2B+4%29+=+5 you will have x%5E2%2B7x%2B+12+=+5 and you have the equation of degree 2