Please help me with 4/a, b, c and 5/b

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 - Multiplication can be transformed into difference of squares using the rule: .

- So change the equation using the rule:

- Expand and :

- Calculate and :

So the end equation would be: .

- Multiplication can be transformed into difference of squares using the rule: .

- So change the equation using the rule:

- Expand and :

- Calculate and :

So the end equation would be: .

- Multiplication can be transformed into difference of squares using the rule: .

- So change the equation using the rule:

- Expand :

- Calculate and :

So the end equation would be: .

- Consider . Multiplication can be transformed into difference of squares using the rule: .

- So change the equation using the rule:

- Expand :

- Calculate :

- Use binomial theorem to expand :

- Combine and :

- Consider . Multiplication can be transformed into difference of squares using the rule: .

So change the equation using the rule:

- Expand and :

- Calculate and :

- Combine and :

So the end equation would be: .

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answer: answer is c!

ok i got to organize the

3/15 and 12/55

3*

aha

3*4 equals 12 but not

a: no

b:

8/24 12/35

no

gautie

it's c

5/18 = 25/90

5*5=25

18*5 = 90

hope that you!

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