Answer:
Step-by-step explanation:
Add 1 and subtract 1, so that the expression won't change.
(a² - b²) = (a+b)(a - b)
Here a = x² - (1/x²) and b = 1
1. Blue ribbon = 3/8 ft
1 answer:
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1.When all the three cut outs of the angles A, B, C placed adjacent to each other at a point, then it forms a line forming a straight angle, i.e. 180°.
Flence, it is proved that the sum of the three angles of a triangle is 180°.
Therefore, ∠A + ∠B + ∠C =180
