samarah121 samarah121
  • 02-04-2020
  • Mathematics
contestada

Expand and simplify (4 + √7)(2 - √7).

Respuesta :

Officialalehpeter
Officialalehpeter Officialalehpeter
  • 02-04-2020

Answer:

1 - 2√7

Step-by-step explanation:

( 4 + √7)(2 - √7)

Open the brackets with

( 4+ √7)

= 4( 2 - √7) + √7(2 - √7)

= 8 - 4√7 + 2√7 - √49

= 8 ( -4 + 2)√7 - √49

= 8 - 2√7 - 7

= 8 - 7 - 2√7

= 1 - 2√7

Answer Link

Otras preguntas

yo saco la basura ________ por la semana: los lunes, los jueves y los sábados.
The Big Bang Theory is the one best supported by scientific evidence, according to top scientists. True False
what happened when the first continental congress met
which would most interest walt whitman? a. free speech b. hard work c. nature's beauty d. equal rights
what evidence would be most useful in differentiating between the remains of australopithecus afarensis and homo habilis? a. structure of the pelvis b. position
What is the REGULAR ending for an -ar verb in the "ustedes" form?
Two geometric means are inserted between 5 and 135 so the four numbers form a geometric sequence. What are these two numbers? Hint: an = a1(r)n − 1, where a1 i
what is generally a safe frequency of activity for a workout? (1 point)
what part of the presidential election process are established by the constitution
you would like to join a fitness center. fit-n-trim charges $80 per month. fit-for-life charges a one time membership fee of $75 and $55 per month. which fitnes