Q1) \(x^2 + 10x + 21\) =0 [
\(x = -3\) or \(x = -7\)]

Q1) \(x^2 -7x + 12\)=0 [
\(x = 4\) or \( 3\)]

Q1) \(4 x^2 + 20x + 21 =0\) [ x = -3\(\frac{1}{2}\) or x =-1\(\frac{1}{2}\)]

Q2) \(x^2 + 5x + 4\) =0 [
\(x = -1\) or \(x = -4\)]

Q2) \(x^2 + 2x -15\)=0 [
\(x = -5\) or \( 3\)]

Q2) \(9 x^2 + 27x + 8 =0\) [ x = -2\(\frac{2}{3}\) or x =-\(\frac{1}{3}\)]

Q3) \(x^2 + 7x + 12\) =0 [
\(x = -4\) or \(x = -3\)]

Q3) \(x^2 -6x + 9\)=0 [
\(x = 3\) or \( 3\)]

Q3) \(4 x^2 + 8x + 3 =0\) [ x = -1\(\frac{1}{2}\) or x =-\(\frac{1}{2}\)]

Q4) \(x^2 + 12x + 27\) =0 [
\(x = -9\) or \(x = -3\)]

Q4) \(x^2 -x -12\)=0 [
\(x = -3\) or \( 4\)]

Q4) \(4 x^2 + 16x + 15 =0\) [ x = -2\(\frac{1}{2}\) or x =-1\(\frac{1}{2}\)]

Q5) \(x^2 + 16x + 63\) =0 [
\(x = -9\) or \(x = -7\)]

Q5) \(x^2 -6x + 8\)=0 [
\(x = 4\) or \( 2\)]

Q5) \(6 x^2 + 23x + 10 =0\) [ x = -3\(\frac{1}{3}\) or x =-\(\frac{1}{2}\)]

Q6) \(x^2 + 13x + 40\) =0 [
\(x = -5\) or \(x = -8\)]

Q6) \(x^2 -2x -8\)=0 [
\(x = 4\) or \( -2\)]

Q6) \(6 x^2 + 17x + 7 =0\) [ x = -2\(\frac{1}{3}\) or x =-\(\frac{1}{2}\)]

Q7) \(x^2 + 15x + 50\) =0 [
\(x = -10\) or \(x = -5\)]

Q7) \(x^2 + 4x + 3\)=0 [
\(x = -3\) or \( -1\)]

Q7) \(6 x^2 + 11x + 3 =0\) [ x = -1\(\frac{1}{2}\) or x =-\(\frac{1}{3}\)]

Q8) \(x^2 + 15x + 54\) =0 [
\(x = -9\) or \(x = -6\)]

Q8) \(x^2 + 2x -3\)=0 [
\(x = -3\) or \( 1\)]

Q8) \(8 x^2 + 38x + 9 =0\) [ x = -4\(\frac{1}{2}\) or x =-\(\frac{1}{4}\)]

Q9) \(x^2 + 14x + 40\) =0 [
\(x = -4\) or \(x = -10\)]

Q9) \(x^2 -x -6\)=0 [
\(x = -2\) or \( 3\)]

Q9) \(4 x^2 + 20x + 9 =0\) [ x = -4\(\frac{1}{2}\) or x =-\(\frac{1}{2}\)]

Q10) \(x^2 + 8x + 16\) =0 [
\(x = -4\) or \(x = -4\)]

Q10) \(x^2 + 3x + 2\)=0 [
\(x = -1\) or \( -2\)]

Q10) \(9 x^2 + 9x + 2 =0\) [ x = -\(\frac{2}{3}\) or x =-\(\frac{1}{3}\)]