Ask Singapore Homework?
Upload a photo of a Singapore homework and someone will email you the solution for free.
Question
Secondary 1 | Maths
One Answer Below
Anyone can contribute an answer, even non-tutors.
Help ASAP
Date Posted: 2 years ago
Views: 256
See 1 Answer
done
{{ upvoteCount }} Upvotes
clear
{{ downvoteCount * -1 }} Downvotes
Notice that the height of triangle ADF is equal to AE, which is the side of the square. So AE = 3x + 2. Use the formula for the area of a triangle, but remember that the base of the triangle is DF and not just DE!
Once you have found the area of ADF in terms of x, solve for x. Remember that the expansion of (ax + b)^2 is (a^2)(x^2) + 2(ax)(b) + b^2. Use this identity to find the area of the square in terms of x, then substitute the value of x to obtain the numerical answer.
Once you have found the area of ADF in terms of x, solve for x. Remember that the expansion of (ax + b)^2 is (a^2)(x^2) + 2(ax)(b) + b^2. Use this identity to find the area of the square in terms of x, then substitute the value of x to obtain the numerical answer.
Date Posted:
2 years ago
360 Tutoring Program