Ответ:
1. a)(x²+4y)²=(x²)²+2x²×4y+(4y)²=x⁴+8x²y+16y²
b)(2a³-b)²=(2a³)²-2×2a³×b+b²=4a⁶-4a³b+b²
2.
a)2,56x²-9=(1,6x)²-3²=(1,6x-3)(1,6x+3)
b)a²-16b⁴=a²-(4b²)²=(a-4b)(a+4b)
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Answers & Comments
Ответ:
1. a)(x²+4y)²=(x²)²+2x²×4y+(4y)²=x⁴+8x²y+16y²
b)(2a³-b)²=(2a³)²-2×2a³×b+b²=4a⁶-4a³b+b²
2.
a)2,56x²-9=(1,6x)²-3²=(1,6x-3)(1,6x+3)
b)a²-16b⁴=a²-(4b²)²=(a-4b)(a+4b)