93 R.8 Radical Expressions 117. 423A 27 - 2211B 118. 527A 25 - 1023B 119. A 22 + 3B A 22 - 3B 120. A 25 + 22B A 25 - 22B 121. A 23 11 - 1B A 23 112 + 23 11 + 1B 122. A 23 7 + 3B A 23 72 - 323 7 + 9B 123. A 23 + 28B 2 124. A 25 + 210B 2 125. A322 + 23B A223 - 22B 126. A425 + 22B A322 - 25B Perform the indicated operations and/or simplify each expression. Assume all variables represent positive real numbers. See Examples 10 and 11. 127. 522 128. 827 129. B3 2 3 130. B3 4 7 131. B4 2 25 132. B4 3 4 133. B2 3x 134. B5 3p 135. Bx5y3 z2 136. Bg3h5 r3 137. B3 8 x4 138. B3 9 16p4 139. B4 g3h5 9r6 140. B4 32x5 y5 141. 23 mn # 23 m2 23 n2 142. 23 8m2n3 # 23 2m2 23 32m4n3 143. B3 2 x6 - B3 5 x9 144. B4 7 t12 + B4 9 t4 145. 122 + 328 + 1232 146. 2212 - 1227 - 5248 147. -42 3 3 + 12 3 24 - 22 3 81 148. 52 3 2 - 22 3 16 + 12 3 54 Rationalize each denominator. Assume all variables represent nonnegative numbers and that no denominators are 0. See Example 12. 149. 1 2 + 25 150. 1 4 + 215 151. 27 - 1 227 + 422 152. 1 + 23 325 + 223 153. p - 4 2p + 2 154. 9 - r 3 - 2r 155. 3m 2 + 2m+ n 156. a 2a + b - 1 157. 52x 22x + 2y 158. Concept Check By what number should the numerator and denominator of 1 2 3 3 - 23 5 be multiplied in order to rationalize the denominator? Write this fraction with a rationalized denominator.
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