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w(x)=3x⁴-2x³+x²-4x+5
w(-2)=3(-2)⁴-2(-2)³+(-2)²-4(-2)+5=3·16+16+4+8+5=64+17=81
w(√2)=3√2⁴-2√2³+√2²-4√2+5=3·4-2·2√2+2-4√2+5=19-8√2
2.
(√3x+2√3)²=(√3x)²+2·√3x·2√3+(2√3)²=3x²+12x+12