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Solve x^2+4x-5=0 by completing the square.

x^2+4x-5=0(x+2)^2-(2)^2-5=0subtract 2^2 as (x+2)^2 = x^2+4x+4 when we want x^2+4x(x+2)^2-4-5=0(x+2)^2-9=0(x+2)^2=9square root both sidesx+2=+/-3x=-2+/-3x=-2+3 or x=-2-3x=1 or x=-5
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Answered by Evie M. • Maths tutor
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The radius of a pizza is 12cm, calculate the area of the pizza in terms of pi

To calculate the answer to this question we need to know the formula for the area of the circle. The area of a circle is: A = Pi x r^2 The value of r is given in the question; r = 12. We then just plug this ...
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Answered by Beth B. • Maths tutor
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To what extent is the New Right internally coherent? (45)

The New Right was a political system that emerged in the UK and USA in the 1970s and 80s, as a response to the failures of the post-WWII consensus. It married neoliberal economics and neoconservative social ...
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Answered by Jake W. • Politics tutor
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In what way does Judith Jarvis Thompson's argument contribute to the abortion debate?

Judith Jarvis Thompson, through the use of analogy, argues that abortion is morally permissible, but only in three certain cases. These cases are 1) if the mother has been raped, 2) if contraception was used...
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Answered by Kazia G. • Philosophy tutor
4787 Views

Find the area under the curve y = (4x^3) + (9x^2) - 2x + 7 between x=0 and x=2

To be able to solve this, the equation needs to be integrated. To do this, simple integration needs to be applied where the power of 'x' increases by 1 and the coefficient of 'x' is divided by the new power....
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Answered by Yash S. • Maths tutor
5431 Views