Question

2 lagatar prakirt sankhyao ka gunanfal 20 hai to sankhya gayat kare

Answer 1

Step-by-step explanation:

x(x+1) = 20

x²+x-20 = 0

x²+5x-4x-20 = 0

x(x+5)-4(x+5) = 0

(x+5)(x-4) = 0

x = -5 not possible

& x = 4 ✓

first number x = 4

second number (x+1) = 4+1 = 5