Question

If Q(x)=7x^2-1 find(-10) Q(-10)

Answer 1

`\huge\boxed{Q(-10)=699}`

Explanation:

`Q(-10)-\text{put}\ x=-10\ \text{to the equation of}\ Q(x)=7x^2-1:\\\\Q(-10)=7(-10)^2-1\qquad\text{first - exponentiation}\\\\Q(-10)=7(100)-1\qquad\text{next - multiplication}\\\\Q(-10)=700-1\qquad\text{last subtraction}\\\\Q(-10)=699`