Question

Israel started to solve a radical equation in this way:

Answer 1

what mistake did isreal make?

Answer 2

Israel started to solve a radical equation in this way:

Square root of x plus 6 − 4 = x
Square root of x plus 6 − 4 + 4 = x + 4
Square root of x plus 6 = x + 4
(Square root of x plus 6)2 = (x + 4)2
x + 6 = x2 + 8x + 16
x + 6 − 6 = x2 + 8x + 16 − 6
x = x2 + 8x + 10
x − x = x2 + 8x + 10 − x
0 = x2 + 7x + 10
0 = (x + 2)(x + 5)

x + 2 = 0 x + 5 = 0
x + 2 − 2 = 0 − 2 x + 5 − 5 = 0 − 5
x = −2 x = −5

Solutions = −2, -5

Answer 3

A) He subtracted 6 before subtracting x.

B) He added 4 before squaring both sides.

C) He factored x2 + 7x + 10 incorrectly.

D) He did not check for extraneous solutions.

Answer 4

@abb0t can you help?

Answer 5

Can you write the function using the LaTex equation editor on the bottom of this?

Answer 6

Which do you think it is.

Answer 7

√x+6 -4=x

Answer 8

im not sure im confused.. could you help?

Answer 9

@phi caan you helpp?

Answer 10

@whpalmer4 help? :)

Answer 11

@dmezzullo help :)

Answer 12

@timo86m help:)

Answer 13

it be better if you wrote it or used perentesis

LIke

sqrt(x)-4

is different from

sqrt(x-4)

Answer 14

√(x+6) -4=x

Answer 15

better? @timo86m

Answer 16

help.. @timo86m

Answer 17

C) He factored x2 + 7x + 10 incorrectly.

I wanna say that check it yourself :) are the factors of it
(x + 2)(x + 5)

easiesst way is to expand

(x + 2)(x + 5)