English, asked by ashokcrpf09, 2 months ago

14. If 5x – 2y = 7 and xy = 2, find the value of (5x + 2y)?.
by using identity

Answers

Answered by Shankar2021

1

Explanation:

hope its helpful thank-you

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Answered by akhilanayak1975

1

Answer:

5x - 2y=7

xy = 2

according to the question,

(5x - 2y)² + 2 ×5X × 2y

= (5x- 2y)² +20xy

=(5x -2y)² + 40

=(7)²+40

=49+40

=89

(5x+2y)² - 4×5x×2y = (5x-2y)²

=>(5x+2y)² - 40xy =(7)²

=>(5x+2y)² -80 =49

=>(5x+2y)²=80+49=129

=>(5x+2y)=√129

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