Factor. \[ x^{2}+3 x-70 \]

Step 1 ：To factor the quadratic equation \(x^{2}+3 x-70\), we need to find two numbers that multiply to -70 and add to 3.

Step 2 ：The numbers that satisfy these conditions are 10 and -7 because \(10 * -7 = -70\) and \(10 + -7 = 3\).

Step 3 ：Therefore, the factored form of the equation is \((x + 10)(x - 7)\).