Tell me the answer for this problem

What expression is equivalent to (2x-1)(x-3)?

Aprojectile is thrown upward so that its distance above the ground after t seconds is given by the function h(t) = -16t2 + 704t. after how many seconds does the projectile take to reach its maximum height?

Iknow its nothing to do with education, but what type of thing should i wrote here? ? : ) its for mcdonald's btw.