Mathematics: Solve these 2 exercises . a + (a-b) + (- a + b) a²+[-b²+2a²]-[a²-b²]

Solve these 2 exercises . a + (a-b) + (- a + b)

Ответ:

daniel2humnle

12.03.2022

First remember that:
- × - = +
+ × + = +
- × + = -
+ × - = -
and:
$(- a {})^{2} = a {}^{2}$

a+ (a-b) + (-a+b)=
a + a -b -a+b= a

${a}^{2} + ( - b {}^{2} + 2a {}^{2} ) - ( {a}^{2} - {b}^{2} ) = \\ a {}^{2} + b {}^{2} + 2a {}^{2} - a {}^{2} - b {}^{2} = 2a {}^{2}$

please mark as brainliest answer.

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Ответ:

leilaelmazry

21.11.2021

Mathematics

9x^2 + px + 4 =0
ax^2 + bx + c
a = 9 , b = p, c = 4
b^2 - 4ac = 0
(p)^2 - 4(9 x 4) = 0
p^2 - 4(36) = 0
p^2 - 144 = 0
p^2 = 144
p = √144
p = +12 or -12
One of the root of 9x^2+px+4 = 0 is four times the other root. find possible value of p

One of the root of 9x^2+px+4 = 0 is four times the other root. find possible value of p

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Solve these 2 exercises . a + (a-b) + (- a + b) a²+[-b²+2a²]-[a²-b²]

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