Thrice the square of a natural number decreased by 4 times the number is equal to 50 more than the number. The number is ?Options4576
Question
Thrice the square of a natural number decreased by 4 times the number is equal to 50 more than the number. The number is ?Options4576
Solution
Vamos resolver a equação passo a passo.
Seja o número natural.
A equação dada é:
Primeiro, vamos reorganizar a equação para que todos os termos estejam de um lado:
Agora, vamos resolver essa equação quadrática usando a fórmula de Bhaskara:
Aqui, , e .
Primeiro, calculamos o discriminante ():
Agora, aplicamos o valor do discriminante na fórmula de Bhaskara:
Isso nos dá duas soluções:
Como estamos procurando um número natural, descartamos a solução negativa. Portanto, a solução é:
A resposta correta é 5.
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