Question

find 2 consecutive number whowe sq has the sum85​

Answer 1

Answer: 42+43=85.............

Answer 2

Step-by-step explanation:

Hey mate this is my answer and i understand like this

2 consecutive number : x , x + 1

squares : ( x )^2 + ( x + 1 )^2

( x )^2 +( x + 1 )^2 = 85

x^2 + x^2 + 1^2 + 2×x×1 = 85

2x^2 + 1 + 2x = 85

2x^2 + 2x = 85 - 1

2x^2 + 2x = 84

2x^2 + 2x - 84 = 0

since : ( a + b ) ^2 = a^2 + b^2 + 2ab

note : always x^2 coefficient value is [ + ]

x^2 = x square