Question

Упростите выражение:
1)(4y^2+3)^2+(9-4y^2)^2-2(4y^2+3)(4y^2-9)
2)(a^2-6ab+9b^2)(a^2+6ab+b^2)-(a^2-9b^2)^2
3)(x+3b)(x-3b)-(x+2b)(x^2-2bx+4b^2)
4)(x+1)(x^2+x-1)-(x-1)(x^2-x-1)

Answer 1

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