Question

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$(5p - 1) {}^{2}$
$(2n - 1)(2n + 3)$
$4p {}^{2} - 25q {}^{2}$
Answer correctly . to get 15 thanks .❤⚡
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Answer 1

Step-by-step explanation:

(5p - 1)²

Comparing ( 5p - 1 )² with (a - b)² we have a = 5 and b = 1

(a - b)² = a² - 2ab + b²

(5p - 1)² = (5p)² - 2(5)(1) + (1)²

= 5²p² - 10p + 1

= 25p² - 10p + 1

____________

(2n - 1)(2n + 3)

Comparing (2n - 1)(2n + 3) with (x + a) (x + b) we have a = -1 and b = 3

(2n + 1) (2n + 3) = (2n)² + (-1 + 3) 2n + (-1)(3)

= 2²n² + 2(2n) - 3

= 4n² + 4n -3

_________

4p² − 25q²

Comparing 4p² − 25q² with (a²- b²) = (a - b) (a + b) we have a = 4 and b = 25

(4p² − 25q²) = (4p - 25q) (4p + 25q)

= 16p² + 100pq - 100pq - 625q²

= 16p² - 625q²

____________

Answer 2

Answer:

answer is given bro....