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\left(45x^{2}\right)^{2}-25
Multiplication can be transformed into difference of squares using the rule: \left(a-b\right)\left(a+b\right)=a^{2}-b^{2}. Square 5.
45^{2}\left(x^{2}\right)^{2}-25
Expand \left(45x^{2}\right)^{2}.
45^{2}x^{4}-25
To raise a power to another power, multiply the exponents. Multiply 2 and 2 to get 4.
2025x^{4}-25
Calculate 45 to the power of 2 and get 2025.
\left(45x^{2}\right)^{2}-25
Multiplication can be transformed into difference of squares using the rule: \left(a-b\right)\left(a+b\right)=a^{2}-b^{2}. Square 5.
45^{2}\left(x^{2}\right)^{2}-25
Expand \left(45x^{2}\right)^{2}.
45^{2}x^{4}-25
To raise a power to another power, multiply the exponents. Multiply 2 and 2 to get 4.
2025x^{4}-25
Calculate 45 to the power of 2 and get 2025.