TURMA OLÍMPICA NÍVEL II- JIJOCA DE JERICOACORA.
Quiz
•
Mathematics
•
8th Grade
•
Practice Problem
•
Medium
MARIA XAVIER
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20 questions
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1.
MULTIPLE CHOICE QUESTION
2 mins • 2 pts
1) O resultado de (x+z)2 é:
x2+ 2xz - z2
x2 - 2xz + z2
x2 + z2 - 2xz
x2 + 2xz + z2
2.
MULTIPLE CHOICE QUESTION
2 mins • 2 pts
2) A expressão algébrica que se adiciona a2 +b2 para obter o quadrado de a-b2 é:
-a2-b2
a2+b2
a2-b2
-2ab2
3.
MULTIPLE CHOICE QUESTION
2 mins • 2 pts
3) Qual o número que elevado ao quadrado é 169
4.
MULTIPLE CHOICE QUESTION
2 mins • 2 pts
4) Calcule (a-b)2 , sendo a e b números reais positivos, e sabendo que a2 + b2 =117 e a.b = 54
5.
MULTIPLE CHOICE QUESTION
2 mins • 2 pts
5) A diferença de 15222 - 15202 é igual a:
Lembre-se (x+y). (x-y)= x2 -y2
6.
MULTIPLE CHOICE QUESTION
2 mins • 2 pts
6) Ao desenvolver o produto (2x+4)2 , encontramos como solução o polinômio:
4x2 + 16x + 16
4x2+ 16
4x2 + 8x + 8
4x + 8
7.
MULTIPLE CHOICE QUESTION
2 mins • 2 pts
7) Se x+y = 13 e x.y = 1, quanto vale x2 +y2?
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