PRODUTOS NOTÁVEIS
Quiz
•
Mathematics
•
9th - 12th Grade
•
Practice Problem
•
Hard
Daniela Moura
Used 4+ times
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8 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Qual a expansão correta de (x + 3)² ?
x² + 3x + 9
x² - 6x + 9
x² + 6x + 9
x² + 9
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Qual a expansão correta de (x - 7)² ?
x² - 49
x² - 14x + 49
x² + 14x + 49
x² - 14x – 49
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Qual o resultado da expressão abaixo? (x - 6)² - (x + 6)²
2x² + 36
24x
-24x
2x² - 36
4.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Sabendo que a2 + b2 = 97 e ab = 39, qual o valor de (a + b)2?
133
178
61
582
5.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Qual é a área de um quadrado cujo lado mede a + 5b ?
a² + 25
a² + 5
a² + 5ab +25
a² + 10ab + 25b²
6.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Desenvolvendo algebricamente o produto (x + 5).(x - 5) obtemos
2x
x² - 25
x² -10x +025
x² + 25
7.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Ao calcular a área de uma determinada casa, representada na figura abaixo, uma pessoa calculou a área de cada cômodo da casa, encontrando a seguinte expressão: ab + ac + 10b + 10c. Outra pessoa calculou a área dessa mesma casa de outra maneira, chegando também ao resultado anterior. De que forma essa pessoa pode ter representado a área dessa casa?
(a + 10) • (b + c)
(a + b) • (10 + c)
(c + 10) • (a + b)
(a + c) • (b + 10)
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