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they are similar because squared root is the number multiply by its self to get the answer. and the squared number is the answer to the problem's u multiplied my its self.exzample=the square root of 9 would me 3.3*3=9 3*3 is the square root and 9 is the squared part.
Not to the square root, but to the square.
2 radicals are similar (like terms) if, when in simplified form, the index is the same, and the radicand is the same. The coefficient may be different. EX: 3(sq root 2) and 5(sq root 2) are like terms, but 3(cube root 2) is not a like term for either.
Technically,no. A radical equation has a radical (Square root) in it, and has two solutions because the square root can be positive or negative.
Similar radicalssuch as ... 5(sq root 7) + 3(sq root 7) are similar because the radical has the same root index and the same number inside the radical. Like variables they can have different coefficients. 2x and 5x are similar ( called like terms) add the coefficients. 2x + 5x = 7x similarly 5(sq root 7) + 3(sq root 7) = 8(sq root 7)