Question

25a²+40ab+16b²-25a²+16b²+25a²-
40ab+16b²
pls answer in five minutes I need it quick ​

Answer 1

Answer:

(5a + 4b)²

Step-by-step explanation:

25a² + 40ab + 16b²

(5a)² + 2.5a.4b + (4b)²

(5a + 4b)²

Answer 2

Question:-

25a²+40ab+16b²-25a²+16b²+25a²-

40ab+16b².

The above question is in the form of,

a² + 2ab + b² = (a+b)² and

a² + 2ab - b² = (a - b)².

Answer:-

5a² + 4b²- 5a² + 4b² + 5a² - 4b²

[In the above step, 5a² and -5a², 4b² and -4b² gets cancelled]

Therefore,

Answer = (5a + 4b)²