ravikant

square root means 1/2 exponent,

so we can write the above problem as (49x⁶)^1/2

^{now distribute that exponent 1/2 on each term inside the parenthesis,}

so now we will hve (49)^1/2 (x⁶)^1/2

(7²)^1/2 (x)6/2

(7)^2/2 (x³)

(7)¹ (x³)

7x³ 

so 7x³ is the answer.

x²+19x+84=0

x²+12x+7x+84=0

x(x+12)+7(x+12)=0

(x+12)(x+7)=0

x+12=0  or  x+7=0

x=-12  or  x=-7