Help Please For My Math
Help please for my math
1. x³+5x-19Subtitute x=3
3³+(3)5-19
27+15-19
=23
2. x²+xy+y²
Substitute ,x=2,y=3
(2)²+(2)(3)+(3)²
4+6+9
=19
3.x²+xy²+4y
Substitute
x=4,y=6
(4)²+(4)(6)²+4(6)
16+144+24
=184
4.(2)²+2(2)(4)+3(4)²(6)+(6)²
4+16+288+36
=344
5. 5³+(5²)(7)+5(7²)(1)+(7³)(1²)+1³
=889
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