Question

(2x+5)² - (2x - 5) ² = 40
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Answer 1

Answer:

This is ur answer dear.....

Answer 2

Answer:

we know that, a^2-b^2=(a-b)(a+b)

Step-by-step explanation:

so,[(2x+5)-(2x-5)][(2x+5)+(2x-5)]=40

(2x+5-2x+5)(2x+5+2x-5)=40

10×4x=40

x=40/40,

x=1