Question

(2+5)²-(2-5)²

find answer​

Answer 1

Answer:

I'm not an expert but let's try!

2 plus 5 equals 7 and square of 7 equals 49.

so the equation becomes

49-(2-5)²

now 2 minus 5 eauals 3 and square of 3 9 so now it becomes

49-(-9)

now - and - becomes + and 49 plus 9 equals 58.

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Answer 2

• As per the data given in the question, we have to determine the value of the given expression.

       Given data:- $(2+5)^{2}-(2-5)^{2}.$

       To find:- the value of the given expression.

       Solution:-

• Here, we will use algebraic identities.
• $(a+b)^{2}=a^{2}+2\times a\times b+b^{2}.$
• $(a-b)^{2}=a^{2}-2\times a\times b+b^{2}.$
• So, we will use the above algebraic identities.

        Therefore,

      $=2^{2}+2\times2\times5+5^{2}-(2^{2}-2\times2\times5+5^{2})\\=(4+20+25)-(4-20+25)\\\Rightarrow 49-9=40.$

  Hence, the value will be $40.$