Q.IV(A) Multiplication of polynomials - (Any 2)
1) (x² – 3x + 4)(4x
+ 1)
2) (5x - 2)(2x - 3)& (3x - 1)
3) By using the
identity find the product of 155 x 158.
Answers
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Step-by-step explanation:
1) ( x²-3x+4)(4x+1)
x²(4x+1)-3x(4x+1)+4(4x+1)
4x³+x²-12x²-3x+16x+4
4x³-11x²+13x+4
3) 155×158=(150+5)(150+8)
(x+a)(x+b)=x²+x(a+b)+ab
(150+5)(150+8)=150²+150(5+8)+(5)(8)
=22500+150(13)+40
=22500+1950+40
=24490
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