first factor
(y-3)(y+1) so then u now have 2 problems
y-3=0 so y=3
y+1=0 so y=-1
answer y=3 and -1
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You would set the equation equal to 0 and then solve for x. You may get one or several answers for x, x being the number(s) that make the equation equal 0.
1
You simplify expressions and solve equations. You don't simplify something that has an equal sign, and you don't solve something that doesn't have an equal sign. For examples, you simplify 2/4 and solve x + 0 = 1
to solve 18-70 you would subtract just like any other equation. 18-70 is equal to a negative number, -52.
To solve for intercepts on a straight line graph put the equation in the form y=mx+c where c is the y-intercept and you have the y intercept. Now to solve x-intercept set y=0 eg y=2x+5 0=2x+5 2x=-5 x=-2.5 For intercepts on other forms of graphs eg parabola y-intercept= make x equal to 0 and solve x-intercept= make y equal to 0 and solve