Question

the product of a number and the one obtained by decreasing it by 7 is -12 the value of the number can be​

Answer 1

let the number be x

given that,

x(x-7)= -12

x^2 - 7x +12=0

here, a=1 b=-7 c=12

x= [-b+-√(b^2-4ac)]/2a

= [7+-√ (49-36)]/2

= (7+-√13)/2

the numbers are (7+√13)/2 and (7-√13)/2.