Question

answer these
I need help pls help​

Answer 1

Answer:

3. 27a⁴/9a³.

3a¹ (or) 3a.

4. 25x²-49y².

(5x)²-(7y)².

(5x+7y)(5x-7y). (Because a²-b²=(a+b)(a-b) where a=5x & b=7y).

5. a²b²-9.

(ab)²-(3)².

(ab+3)(ab-3). (Because a²-b²=(a+b)(a-b) where a=ab & b=3).

6. a⁴-16.

(a²)²-(4)².

(a²+4)(a²-4). (Because a²-b²=(a+b)(a-b) where a=a² & b=4).

8. -28x³y²z²/7xyz.

-4x²y¹z¹ (or) -4x²yz.

12. -36y³/9y².

-4y¹ (or) -4y.

14. 26xy(x+5)(x-4)/13xy(x-4).

2(x+5) (or) 2x+10.

15. (l+m)²-4lm.

(l²)+(m)²+2(l)(m) -4lm. (Because (a+b)²=a²+b²+2ab where a=l & b=m).

l²+m²+2lm-4lm.

l²+m²-2lm. (Because +×-=- & largest number is important).

16. a⁴+2a²b²+b⁴.

(a²)²+2(a²)(b²)+(b²)².

(a²+b²)². (Because a²+2ab+b²=(a+b)² where a=a² & b=b²).

18. 63a²b⁴c^6/7a²b²c³.

9b²c³.

20. x²-3x+2.

x-1=0.

x=1.

(1)²-3(1)+2.

1-3+2.

-2+2. (Because +×-=- & largest number is important).

0. (Because -×+=-).

Sorry I didn't understand other questions.

I think this is your answer.