Looking to match the general expression ax^2 + bx + c
1). 2s(s-4) → 2s^2 - 8s : a = 2, b = -8, c = 0. In this case we have s standing in for x.
2). (w + 7)(w + 3) → w^2 + 10w + 21: a = 1, b = 10, c = 21. In this case we have w standing in for x.
Try the rest yourself. I assume 3) should be (2t -1)(t + 5) or it won't be a quadratic!
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