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3 years ago

What value of D is a solution to this equation-63=-7dd=-7ord=9

Mathematics

2 answers:

ikadub [295]3 years ago

8 0

D is equal to 9 in -63=-7d

Nataly [62]3 years ago

5 0

D = 9
I know this because a negative times a positive will give you a negative. So if you multiply -7x9= -63

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vladimir1956 [14]

The second term of the expansion is $-4a^3b$ .

Solution:

Given expression:

$(a-b)^4$

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$(a-b)^4$

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$=\frac{4 !}{0 !(4-0) !} a^{4}(-b)^{0}+\frac{4 !}{1 !(4-1) !} a^{3}(-b)^{1}+\frac{4 !}{2 !(4-2) !} a^{2}(-b)^{2}+\frac{4 !}{3 !(4-3) !} a^{1}(-b)^{3}+\frac{4 !}{4 !(4-4) !} a^{0}(-b)^{4}$ $=a^{4}-4 a^{3} b+6 a^{2} b^{2}-4 a b^{3}+b^{4}$

Hence the second term of the expansion is $-4a^3b$ .

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