Next is Problem 3 still can earn 11 points

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Ответ:

shatoriahubbard3255

09.12.2020

Mathematics

Step-by-step explanation:

1. $4(2x^{2}+3y^{2})^{2}$

= $4(4x^{4}+9y^{4}+12x^{2}y^{2})$

= $16x^{4}+36y^{4}+48x^{2}y^{2}$

2. $4(2x^{2}+3y^{2})(2x^{2}-3y^{2})$

= $4((2x^{2})^{2}-(3y^{2})^{2})$

= $4(4x^{4}-9y^{4})$

= $16x^{4}-36y^{4}$

3. $(4x-5)(16x^{2}+20x+25)$

= $64x^{3}-80x^{2}+80x^{2}-100x+100x-125$

= $64x^{3}-125$

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