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Mathematics
8th - 9th Grade
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10 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Qual a expansão correta de (x + 3)² ?
2.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Qual o resultado da expressão abaixo?
(x + 2)(x - 2) + (2 + x)(2 - x)
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Se multiplicarmos a soma de dois números a e b pela diferença entre esses números a e b, teremos como resultado:
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
A diferença entre o quadrado da soma de dois números a e b e o quadrado da diferença entre esses mesmos dois números é:
5.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Resolvendo a equação:
(x + 2)² - (x - 2)² = 8
Chegamos na solução
6.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Se aumentarmos o lado de um determinado quadrado em 2 unidades de comprimento ele passa a ter 16 unidades de área a mais. Qual era a área do quadrado inicial?
7.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Se reduzirmos o lado de um quadrado em 4 unidades de comprimento ele fica com 24 unidades de área a menos. Qual é a área do quadrado reduzido?
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