-5(x+10)(x-10)=0 in standard form

Im literally having a mental breakdown

Look at this pattern ; 1,4,9, number 10000 belongs in this pattern . what’s the place of this number?

Consider the polynomials given below. p(x) = x4 + 3x3 + 2x2 – x + 2 q(x) = (x3 + 2x2 + 3)(x2 – 2) determine the operation that results in the simplified expression below. 35 + x4 – 573 - 3x2 + x - 8 a. p+q b. pq c.q-p d. p-q