2007-07-18 02:52:16 · 3 answers · asked by conmenot 1 in Science & Mathematics ➔ Mathematics
to solve a quadratic equation means to find the points where the graph crosses the x-axis. So, after graphing just notice where the graph crosses the x-axis and you have your answer.
Usually you'll get two answers with a quadratic, for example:
x^2+4x+3 has two solutions (x=-3 and x=-1) since those are the points where the graph crosses the x-axis, but
x^2+4x+4 has only one solution (x=-2) since that is the only point where the graph crosses the x-axis.
2007-07-18 02:59:41 · answer #1 · answered by grompfet 5 · 0⤊ 0⤋
y = ax^2 + bx + c is a quadratic equation and its solution corresponds to those values of x for which y is 0. There will be two values of x (real or imaginary) depending on a, b and c.
2007-07-18 09:58:35 · answer #2 · answered by Swamy 7 · 0⤊ 0⤋
you can do what they said and also after graphing them u can press 2nd then trace which will be (calc) and then zero.. and it will give u the answer .. i hope u understand what i said
2007-07-18 10:15:19 · answer #3 · answered by thatisme 2 · 0⤊ 0⤋