Question

the sum of square of a positive real number and thrice that number is 70 then find the number​

Answer 1

Answer:

Step-by-step explanation:

let the +ve number be x

x^2+3x=70

x^2+3x-70=0

splitting the middle the term

x-7=0 or x+10=0

x=7 or x=10

as x is +ve x=7

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