Question

Desenvolva usando o binômio a expressão (x - 1) 2

Answer 1

$\boxed{(x - 1)^2= \\ \\ \left(\begin{array}{ccc}2\\0\\\end{array}\right )* x^{2} -\left(\begin{array}{ccc}2\\1\\\end{array}\right )*x*1-\left(\begin{array}{ccc}2\\2\\\end{array}\right )*1^2= }\\ \\ \\\boxed{\frac{2!}{0!(2-0)!} * x^{2} -\left[ \frac{2!}{1!(2-1)!} \right ]*x*1-\left[ \frac{2!}{2!(2-2)!}\right] *1=}$

$\boxed{ \frac{2*1}{1*2!} * x^{2}- \left[ \frac{2*1}{1*1!} \right] *x*1-\left[ \frac{2*1}{2*1*0!} \right]*\right]1=} \\\\ \\\boxed{ \frac{2}{1*2*1} * x^{2} -\left[ \frac{2}{1}\right] *x*1-\left[ \frac{2}{2*1*1} \right]*1=} \\\\ \\\boxed{ \frac{2}{2} * x^{2} -2*x*1-1*1= }\\ \\\\ \boxed{1* x^{2} -2x-1}\\\\ \\\boxed{\boxed{x^{2} -2x-1}}$

Answer 2

(x - 1)²

(x - 1) • (x - 1)

x² - x - x + 1

x² - 2x + 1