R+ ∪ R- =, R, R+, ∅, R*, 12, 13, 8, 6, 12, 8, X< -3, X> -3, X⩽ -3, X ≥ -3, √21, √7, -√21, -√7, If 2 x-1 = 1 , what is the value of x ?, 0, -1, 1, -2, ] - ∞ , -1], ] - ∞ , -1[, ] - ∞ , 1], ] - ∞ , 1[, Sixth the number : 212 x 312 =, 62, 64, 611, 623, The value of 311 + 312, 4 x 310, 3 x 322, 4 x 320, 4 x 311, 8 -2√15, 16, 2, 13 - 2√8, {1,2,3,4}, ∅, [1,4], [1,4[, The S.S of the equation 2X2 -7X -4=0 in R is, {0}, { 0.5}, { 0.5 , -4}, { - 0.5 , 4 }, IF X + Y =4 , 3X2 - 3Y2 = 24 , Then X-Y =, 2, 6, 8, 20, The value of k that makes Kx2 + 12xy +9y2 perfect square is, 3, 4, 5, 16, If (4a2 - 2a +1) is one of factors of the expression ( 8a3 +1) , then the other factor is, a+2, 2a+1, 2a - 1, 4a + 1

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