Question

Find two numbers whose product is -840 and their sum is 1.

Answer 1

a.b=-840
a+b=1
a=1-b
(1-b)(b)=-840
$b - {b}^{2} = - 840$
${b}^{2} - b - 840 = 0$
now find the value by
$\sqrt{d}$
method