Question

Ayudaaa xfaaaaa :)) ​

Answer 1

A)

$\frac{(x + 40)(x + 82)}{2}$

$\frac{ {x}^{2} + 82x + 40x + 3280}{2}$

B)

$x = \frac{ - b \frac{ + }{ - } \sqrt{ {b}^{2} - 4ac } }{2a}$

Donde

a = 1

b = 122

c = 3280

$x = \frac{ - (122) \frac{ + }{ - } \sqrt{ {(122)}^{2} - 4(1)(3280) } }{2(1)}$

$x = \frac{ - (122) \frac{ + }{ - } \sqrt{ {(14884)}- 4(3280) } }{2}$

$x = \frac{ - (122) \frac{ + }{ - } \sqrt{ {14884}- 13120} }{2}$

$x = \frac{ - (122) \frac{ + }{ - } \sqrt{ {1764}} }{2}$

$x = \frac{ - (122) \frac{ + }{ - } 42 }{2}$

$x1 = \frac{ - (122) \frac{ + }{ } 42 }{2} = \frac{ - 80}{2} = - 40$

$x2 = \frac{ - (122) \frac{ }{ - } 42 }{2} = \frac{ - 164}{2} = - 82$