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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

EM
Answered by Evie M. Maths tutor
10113 Views

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 the...

BB
Answered by Beth B. Maths tutor
8872 Views

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 soci...

JW
Answered by Jake W. Politics tutor
7668 Views

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 u...

KG
Answered by Kazia G. Philosophy tutor
4218 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 pow...

YS
Answered by Yash S. Maths tutor
4886 Views

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