can i have the answer for the question , find the value of x if 21x=(35)2 - (14)2.
PLZ. URGENT.
21 x = (35)2 - (14)2
so 21x = (35 + 14 )(35 - 14) ..........by using the identity a2 - b2 = (a + b)(a - b)
21 x = 49 * 21
x = 49 * 21 /21
x = 49
Hope that helps.....!!!!!!
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