Question 3 Factorise $x^{2}-3 x-10$

Step 1 ：Find two numbers that multiply to -10 and add to -3: (-5, 2)

Step 2 ：Rewrite the quadratic equation in factored form: \( (x - 5)(x + 2) \)

Step 3 ：\( \boxed{(x - 5)(x + 2)} \)