Write h(x) = 7 + 10x + x2 in vertex form. write h in standard form. h(x) = x2 + 10x + 7 form a perfect square trinomial by adding and subtracting . h(x) = (x2 + 10x + 25) + 7 – 25 write the trinomial as a binomial squared. write the function in vertex form, if needed. what is h(x) = 7 + 10x + x2 written in vertex form? h(x) = (x – 25)2 – 18 h(x) = (x – 5)2 + 32 h(x) = (x + 5)2 – 18 h(x) = (x + 25)2 + 32