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3 years ago

Which of the following equation is true ?

Mathematics

2 answers:

VLD [36.1K]3 years ago

3 0

The last one

Hope this helps

IRISSAK [1]3 years ago

3 0

Answer:

The last option

Step-by-step explanation:

$4^2=4(4)=16\\4^-^2=4(-4)=-16\\16 + (-16) = 0$

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Find a negative integer M so that the equation (x-12)(x+m) = m-51

AleksAgata [21]

Answer:

Move all terms to the left side and set equal to zero. Then set each factor equal to zero.

Step-by-step explanation:

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8 0

3 years ago

Can someone PLEASE help me solve this equation ? due soon

RideAnS [48]

$\sf{Given : 3tanx + 7 = \dfrac{2}{(1 - sinx)(1 + sinx)}}$

We know that : (a - b)(a + b) = a² - b²

$\implies \sf{3tanx + 7 = \dfrac{2}{1 - sin^2x}}$

We know that : 1 - sin²x = cos²x

$\implies \sf{3tanx + 7 = \dfrac{2}{cos^2x}}$

$\sf{\bigstar \ \ We \ know \ that : \boxed{\sf{\dfrac{1}{cos^2x} = sec^2x}}}$

$\implies \sf{3tanx + 7 = 2sec^2x}$

We know that : sec²x = 1 + tan²x

$\implies \sf{3tanx + 7 =2(1 + tan^2x)}$

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$\implies \sf{2tan^2x - 5tanx + 2tanx - 5 = 0}$

$\implies \sf{2tanx(tanx + 1) - 5(tanx + 1) = 0}$

$\implies \sf{(tanx + 1)(2tanx - 5) = 0}$

$\implies \sf{tanx = -1 \ (or) \ tanx = \dfrac{5}{2} }$

8 0

3 years ago

Please only answer the last one.

hammer [34]

Answer:

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AleksAgata [21]

Answer:

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juin [17]

Yes the correct answer is D. Hope this helps :)

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