Add $4$ $x ^ { 4 }$ - $5 x ^ { 2 }$

question 71

Multiple Choice

Add. ( $4$ $x ^ { 4 }$ - $5 x ^ { 2 }$ + $4$ ) + ( $5 x ^ { 4 } - 9 x ^ { 2 } + 1$ ) + ( $2 x ^ { 4 } - 8 x ^ { 2 }$ )

• A) 11x ⁴ - 22x ² + 5
• B) 11x ⁴ + 21x ² + 7
• C) 13x ⁴ - 22x ² + 5
• D) 11x ⁴ + 21x ² - 5
• E) 13x ⁴ - 22x ² - 7

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