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Soloha48 [4]
3 years ago
11

What is the correct expansion of (3x-2)(2x^2+5)

Mathematics
2 answers:
Murljashka [212]3 years ago
7 0
Foil or whatever
just multiply

remember
(a-b)(c+d)=ac-bc+ad-bd
and
(ax^m)(bx^n)=(a)(x^m)(b)(x^n)=abx^{m+n}

so

(3x-2)(2x²+5)=
(3x)(2x²)+(-2)(2x²)+(3x)(5)+(-2)(5)=
6x³-4x²+15x-10
wolverine [178]3 years ago
6 0
3x*2x^2=6x^3
3x*5=15x
-2*2x^2=-4x^2
-2*5=-10
6x^3+15x-4x^2-10=
6x^3-4x^2+15x-10
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