Question

50 Points

Please Solve this with Detailed Procedure.

Dont post Irrelevant Answers
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Answer 1

Answer:

x−4=3⇒x−4+4=3+4⇒x=7

Hence, x = 7 is the solution of the equation.

(2) 9m = 81, m = 3, 9, −3

9m=81Dividing both sides by 9⇒9m9=819⇒m=9

Hence, m = 9 is the solution of the equation.

(3) 2a + 4 = 0, a = 2, −2, 1

2a+4=0⇒2a+4−4=−4⇒2a=−4Dividing both sides by 2⇒2a2=−42⇒a=−2

Answer 2

Answer:

9 is the answer

Step-by-step explanation:

you you should rationalize each time by multiply them with their conjugated.

for eg.

(1/√1+√2)*(√2-√1)(√2-√1)

which gives out √2-√1

second term→√3-√2

third term→√4-√3

.......goes on........

last term→√99-√100

observe that except (√1)&(√100), all terms cancel out.

the answer is -√1+√100

=-1+10

=9