Simplify (x-3)(x+ 7) using the Area model or foil, and identify the resulting expression in standard form.

x^2 +4x -21 thats the answer if you foil the expression, and it is put in standard form

it could be 1,3 and more others to create a cylinder.

step-by-step explanation:

answer:   x = 3 + √11     and     x = 3 - √11

step-by-step explanation:

x² - 6x + 9 = 11

(x - 3)² = 11

x - 3 = ±√11

    x = 3 ± √11

x = 3 + √11     and     x = 3 - √11