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Solve x^2 - 9 = 4x + 12

x 2 - 9 = 4x + 12 x 2 - 9 - 4x = 12 x 2 - 9 - 4x -12 = 0 x 2 - 4x -21 = 0 Factorise into form (x + ?)(x + ?) Factors of -21 are +7 and -3 or -7 and +3 (x + 7)(x - 3) = x 2 + 7x - 3x -21 = x 2 + 4x -21 which ...
KP
Answered by Kira P. • Maths tutor
4338 Views

Present the aims of a political or environmental movement in Modern Standard Arabic

موضوعنا هو ما يسمى بالإنجليزية 'ريوايلدينغ' العملية التي تهدف إلى إعادة الطبيعة أو أجزاء من العالم الطبيعي إلى حالة ما كانت عليها قبل تاريخ. وقد أثارت الحركة جدلاً واسع النطاق لا سيما في أوروبا لسبب بسيط وذل...
JB
Answered by Jacob B. • Arabic tutor
1747 Views

A group of 55 pupils were asked if they owned a phone or a tablet.11 people are known to own both18 said they only owned a tablet34 said they owned at least a phoneA student is picked a random, what is the probability that the student doesn’t have a phone

18/55
UH
Answered by Umer H. • Maths tutor
3982 Views

Do the gods and goddesses in the 'Odyssey' mostly help or hinder Odysseus ?

This question would most likely be 10 marks and is asking for direct comparison.To answer the question fully you would want to pick out specific moments in the 'Odyssey' that demonstrated a god or goddess he...
EC
5086 Views

Why am I learning about matrices? What are they?!

Square matrices can be thought of simply as transformation operators—rotation, translation, or shear (distortion). A 2x2 matrix transforms a set of 2D coordinates, a 3x3 matrix translates a set of 3D coordin...
AT
3393 Views