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3 years ago

5(2 + 3) + 25 + 8 + 4

Mathematics

2 answers:

almond37 [142]3 years ago

8 0

5(2 + 3) + 25 + 8 + 4

Multiply the bracket by 5 first

5(2)+5(3)+25+8+4

10+15+25+8+4

25+25+8+4

Add 25 and 25 first

50+12

=62

Answer: 62

Verizon [17]3 years ago

5 0

Answer:

Step-by-step explanation:

5(2 + 3) + 25 + 8 + 4

= 5 x 5 + 25 + 8 + 4

= 25 + 25 + 8 + 4

= 50 + 12

= 62

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we have been asked to verify that -5, 1/2, and 3/4 are the zeroes of the cubic polynomial $4x^3+20x^2+2x-3$

To verify that whether the given values are zeros or not we will substitute the values in the given Polynomial, if it will returns zero, it mean that value is Zero of the polynomial. But if it return any thing other than zeros it mean that value is not the zero of the polynomial.

Let $f(x)=4x^3+20x^2+2x-3\\\\\text{when x=-5}\\\\f(-5)=4(-5)^3+20(-5)^2+2(-5)-3=-13\\\\\text{when x=}\frac{1}{2}\\$

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Since sum of roots $=\frac{-b}{a}= \frac{-20}{4}=-5\\$

But $-5+\frac{1}{2}+\frac{3}{4}= \frac{-15}{4}\neq-5$

Hence we do not find any relation between the coefficients and zeros.

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