Mathematics, 14.09.2020 15:01 AgentPangolin

(3x+1)(2x-5)=39
i need help

Answers: 3

Show answers

Answers

$(3x+1)(2x-5)=39 \\
6x^2-15x+2x-5=39 \\
6x^2-13x-5=39 \ \ \ \ \ \ \ \ \ \ |-39 \\
6x^2-13x-44=0 \\
6x^2-24x+11x-44=0 \\
6x(x-4)+11(x-4)=0 \\
(6x+11)(x-4)=0 \\
6x+11=0 \ \lor \ x-4=0 \\
6x=-11 \ \lor \ x=4 \\
x=-\frac{11}{6} \ \lor \ x=4 \\
\boxed{x=-1 \frac{5}{6} \hbox{ or } x=4}$

Answer from: biancaTomas010B

   (3x + 1)(2x - 5) = 39
      3x(2x - 5) + 1(2x - 5) = 39
3x(2x) + 3x(-5) + 1(2x) + 1(-5) = 39
      6x² + (-15x) + 2x + (-5) = 39
      6x² - 15x + 2x - 5 = 39
      6x² - 13x - 5 = 39
      - 39 - 39
      6x² - 13x - 44 = 0
          x = -(-13) ± √((-13)² - 4(6)(-44))
      2(6)
      x = 13 ± √(169 + 1056)
   12
      x = 13 ± √(1225)
   12
      x = 13 ± 35
      12
      x = 13 + 35 ∨ x = 13 - 35
      12    12
      x = 48    ∨       x = -22
      12    12
      x = 4    ∨        x = -1⁵/₆
The solution set us equal to {4, -1⁵/₆}.

Answer from: Quest

step-by-step explanation:

its 512 because parenthesis and to the 2nd power is 512 so it will be 512

Answer this question for 50 points and brainliest : d

Answer from: Quest

substitute,

circle 1 = 5

circle 2 = 20

circle 3 = 44

in this case no matter how you add, you will always get a perfect square..

hence proved

happy to

pls mark as brainliest

35 points + brainliest+ only if you answer the question this is a picture solve this puzzle)

Other questions on the subject: Mathematics

Mathematics, 21.06.2019 20:30, ptrlvn01

Which shows the graph of the solution set of 3y – 2x > –18?

Answers: 1

continue

Mathematics, 21.06.2019 21:50, jules8022

Match each whole number with a rational, exponential expression 3 square root 27^2find the domain and range of the exponential function h(x)=125^x. explain your findings. as x decreases does h increase or decrease? explain. as x increases does h increase or decrease? explain.

Answers: 3

continue

Mathematics, 21.06.2019 22:30, lewismichelle11

Which statements are true about additional information for proving that the triangles are congruent check all that apply

Answers: 1

continue

Mathematics, 21.06.2019 23:00, gisellekatherine1

The equation represents the function f, and the graph represents the function g. f(x)=3(5/2)^x determine the relationship between the growth factors of f and g. a. the growth factor of g is twice the growth factor of f. b. the growth factor of f is twice the growth factor of g. c. the growth factor of f is 2.5 times the growth factor of g. d. the growth factor of f is the same as the growth factor of g.

Answers: 3

continue

You know the right answer?

(3x+1)(2x-5)=39
i need help...