## anonymous one year ago Solve x2 -10x = -21 x=7 and x=3 x=-7 and x=3 X=-7 and x=-3 X=7 and x=-3

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1. anonymous

x=7,x=3

2. anonymous

Use factoring $\huge~\rm~ax^2+bx+c=0$ This is the form we need to get our equation in $\huge~\rm~x^2 -10x +21=0$ I added the 21 so we get the eqution we are looking for Now we factor |dw:1436363504141:dw| What numbers multiply to make 21 but adds to make -10?

3. anonymous

if you want to save your time,you can solve it through factorization.

4. anonymous