please explain your answer properly
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Given, 89 - 28 root 10
= 49 + 40 - 28 root 10
= (7^2 + 2 root 10 - 2 * 7 * 2 root 10)
= (7 - 2 root 10)^2
= (5 + 2 - 2 root 10)^2
= ((root 5)^2 + (root 2)^2 - 2 (root 5) root 2)^2
= (root 5 - root 2)^4
4th root = (root 5 - root 2).
Hope this helps!
= 49 + 40 - 28 root 10
= (7^2 + 2 root 10 - 2 * 7 * 2 root 10)
= (7 - 2 root 10)^2
= (5 + 2 - 2 root 10)^2
= ((root 5)^2 + (root 2)^2 - 2 (root 5) root 2)^2
= (root 5 - root 2)^4
4th root = (root 5 - root 2).
Hope this helps!
sanidhyasingla:
is 40 =2✓10
can you solve it on the paper and post the picture
root 40 can also be written as root 4 * 10 = 2 root 10
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this method is known as finding the square root by inspection method.
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