Write the word or phrase that best completes each statement or answers the question. Provide the missing information.
-Consider the equation $\left( 4 x ^ { 2 } + 1 \right) ^ { 2 } + 4 \left( 4 x ^ { 2 } + 1 \right) + 4 = 0 .$ 4 = 0. If the substitution
u = ________is made, then the equation becomes $u ^ { 2 } + 4 u + 4 = 0$

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The Answer of Write the word or phrase that best completes each statement or answers the question. Provide the missing information.
-Consider the equation $\left( 4 x ^ { 2 } + 1 \right) ^ { 2 } + 4 \left( 4 x ^ { 2 } + 1 \right) + 4 = 0 .$ 4 = 0. If the substitution
u = ________is made, then the equation becomes $u ^ { 2 } + 4 u + 4 = 0$

Write the Word or Phrase That Best Completes Each Statement (4x2+1)2+4(4x2+1)+4=0.\left( 4 x ^ { 2 } + 1 \right) ^ { 2 } + 4 \left( 4 x ^ { 2 } + 1 \right) + 4 = 0 .(4x2+1)2+4(4x2+1)+4=0.

Write the Word or Phrase That Best Completes Each Statement $\left( 4 x ^ { 2 } + 1 \right) ^ { 2 } + 4 \left( 4 x ^ { 2 } + 1 \right) + 4 = 0 .$