Kathryn014
Kathryn014 Kathryn014
  • 26-10-2017
  • Mathematics
contestada

factor 9x^2 -5 . using difference of squares

Respuesta :

jdoe0001 jdoe0001
  • 26-10-2017
[tex]\bf \textit{difference of squares} \\ \quad \\ (a-b)(a+b) = a^2-b^2\qquad \qquad a^2-b^2 = (a-b)(a+b)\\\\ -------------------------------\\\\ 9x^2-5\qquad \begin{cases} 9x^2=3^2x^2\\ \qquad (3x)^2\\ 5=\sqrt{5^2}\\ \qquad (\sqrt{5})^2 \end{cases}\implies \begin{array}{llll} (3x)^2-(\sqrt{5})^2 \\\\\\ (3x-\sqrt{5})~(3x+\sqrt{5}) \end{array}[/tex]
Answer Link

Otras preguntas

Where did Martin Luther King Jr., deliver his famous "I have a dream" speech? A. at the headquarters of the United Nations in New York B. from his jail cell in
In which body of water is Guam? Atlantic Pacific Gulf of Mexico Caribbean Sea
Peter the Great's main achievement as czar of Russia was to __________. conquer the Byzantine Empire become head of the Orthodox Church destroy serfdom westerni
Athens and Sparta compare the qualities that made the two city states successful
Select the TWO countries that were most involved in the fur trade. England Holland France Spain Portugal
make x the subject of the formula . w=x+y
quartz gold and calcite are examples of?coal is what
Which Athenian admiral won a great victory at the Battle of Salamis? A. Themistocles B. Darius C. Leonidas D. Xerxes
The New Deal was designed to distribute the nation's abundance to:
The Nile River originates in which of the following bodies of water? Lake Volta Lake Chad Lake Victoria Lake Tanganyika