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Expand: (4z - 3a +2z²)² |
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Answer» Answer: 16z²-9a²+4z⁴-24az-12az²+16z³ Step-by-step explanation: by COMPARING the expression with (a+b+c)² we GET : a = 4Z ; b= -3a ; c=2z² We KNOW ,(a+b+c)²= a²+b²+c²+2ab+2bc+2ca so, (4z - 3a +2z²)² = (4z)²+(-3a)²+(2z²)² + 2.4z.(-3a) +2.(-3a).2z²+2×2z².4z = 16z²-9a²+4z⁴-24az-12az²+16z³ |
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