Welcome to Westonci.ca, where finding answers to your questions is made simple by our community of experts. Get quick and reliable solutions to your questions from knowledgeable professionals on our comprehensive Q&A platform. Get detailed and accurate answers to your questions from a dedicated community of experts on our Q&A platform.

Which of the following are solutions to the equation below?
Check all that apply.
X^2-3x+ 27 = 6x + 7


Sagot :

[tex]\\ \rm\bull\rightarrowtail x^2-3x+27=6x+7[/tex]

[tex]\\ \rm\bull\rightarrowtail x^2-3x-6x+27-7=0[/tex]

[tex]\\ \rm\bull\rightarrowtail x^2-9x+20=0[/tex]

[tex]\\ \rm\bull\rightarrowtail x^2-5x-4x+20=0[/tex]

[tex]\\ \rm\bull\rightarrowtail x(x-5)-4(x-5)=0[/tex]

[tex]\\ \rm\bull\rightarrowtail (x-4)(x-5)=0[/tex]

[tex]\\ \rm\bull\rightarrowtail x=4,5[/tex]

♪Answer :

»x² - 3x + 27 = 6x + 7

  • ax² + bx + c = 0

»x² - 3x + 27 - 6x - 7 = 0

»x² - 9x + 20 = 0

»(x - 4)(x - 5) = 0

»(x - 4) = 0 V (x - 5) = 0

  • For [tex]\tiny x_1[/tex]

»x - 4 = 0

»x = 0 + 4

»x = 4

  • For [tex]\tiny x_2[/tex]

»x - 5 = 0

»x = 0 + 5

»x = 5

  • x = {x| 4 or 5, x€R}