Math, asked by Bridhiswa1, 2 months ago

Find the value of p for which the expression 9x²+pxy+25y² is a perfect square. The Answer is p=30. But I need the steps. please help

Answers

Answered by rushikeshsing25

5

Answer:

9x²+pxy+25y²

we know that

(3x+5y)²=9x²+pxy+25y² (a = 3x, b=5y)

(a+b)²= a²+ 2ab+b² by using this formula

a² =9x² b²= 25y² 2ab= pxy

2ab = 2*3x*5y

= 30xy

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